lighting fixture terminology

The measurement of light and its properties. Fluorescent light built into a soffit at the top corner of a wall (i.e., where the wall meets the ceiling). Preheating is accomplished by applying a very low voltage that is high enough to raise the temperature of electrodes, but without causing the lamp to ignite. This kind of rebate is issued when the corresponding materials are purchased. In the BUG rating, these effects are indicated in a scale from 0 to 5, where 0 indicates the effect is minimized and 5 indicates it is not controlled at all. The housing is the actual light fixture. Halogen lamps also provide brighter, whiter light with better color characteristics, longer life and improved energy efficiency. This happens in fluorescent or HID lamps as the chemical balance becomes unbalanced and causes the lamp to shift to a pink, green, orange, or purple tint. Swivel. Acronym for alternating current, which describes a source where the voltage changes polarity multiple times per second, with a frequency of 50 Hz or 60 Hz depending on the country. HEP lighting offers a very high efficacy (over 90 lumens per watt) and perfect color rendition (CRI = 100). For example, an IP67 rating indicates a higher degree of protection than an IP54 rating. Describes how effectively a lighting fixture can convert electric power into lighting, measured in lumens per watt. The real power is represented by the actual watts consumed, while the apparent power is the multiplication product of voltage and current, measured in volt-amperes. }); hbspt.forms.create({ Multiple LEDs (light-emitting diodes) aligned in a single strip and used for creating uninterrupted lines of directional lighting. Not to be confused with luminous efficacy. An acoustic sensor that measures distances by sending and receiving ultrasonic signals. Cyclorama: a curved backdrop, sometimes made of cloth, used to create background scenery with color… ETL (Electrical Testing Labs) is another electrical safety certification. Using lamps with a high CRI value is very important in high-end interior design, as they enhance the visibility of décor and fine details. CFL bulbs with a screw base are one of the best-known types. Lighting designed to provide visibility when the normal lighting system fails, for example during blackouts. Click the word below to see the definition. formId: "57ebcd10-bfe2-43a8-a2f8-93068502c170" A fill light illuminates the shadows that are created by the key light. Therefore, the best possible BUG rating is B0 U0 G0, and the worst possible rating is B5 U5 G5. Prescriptive lighting rebate programs are not designed to be claimed instantly. A lamp can refer to a light source, such as a light bulb, or to a light fixture that creates light. Used to describe a power supply where the flow of electricity always takes place in the same direction, such as that provided to LED arrays by their drivers. ANSI also coordinates national and international standards, allowing US products and services to be used elsewhere. Also known as E39 base, it is larger than the medium E26 base and commonly used by HID lamps. formId: "04389d6a-7afd-414c-8b1c-9a9efd6f8550" Semi-Flush Mount. The portion of luminous output that gets a response from the cones in human eyes, which are responsible for daytime vision. Lighting located above, below or to the sides of a bathroom mirror. Institute of Electrical and Electronics Engineers, a global professional association with over 400,000 members. International Lighting Commission (French: Commission internationale de l’éclairage), an authoritative organization in the lighting industry across the globe. Low CRI causes some colors to appear washed out or even to take on a completely different hue. See Pendant Light / Pendant Fixture / Pendant Lamp. One lumen per square foot equals one footcandle, while one lumen per square meter equals one lux. Lighting Fixtures in Stanwood on YP.com. Some of the application parameters they define are wattage, base type, envelope size, and light center length. mlaro. A measure of the rate of flow of electricity expressed in amperes. Troffers typically have predetermined dimensions, such as 2’x2’ or 2’x4’. The panel is encircled by an array of LEDs, and the etched pattern refracts the light uniformly in all directions. Measurement unit for electric current. The opposite effect is wall grazing. LED lighting) or renewable energy systems (e.g. A complete and functional lighting fixture. Each of these names refers to the beam angle range of the light fixture. }); hbspt.forms.create({ It includes elements designed to control light output, such as a reflector (mirror) or refractor (lens), the ballast, housing, and attachment parts (baffle… One foot-candle is equivalent to one lumen per square foot (See Illuminance). Halogen lamps are around 25% more efficient than their incandescent counterparts. An older ballast that regulates electricity incrementally. Each lighting circuit is connected to a circuit breaker, and it interrupts current automatically if an overload or fault is detected. Mean lumen values for fluorescent and HID lamps are typically measured at 40% of their rated lives. Instant start ballasts apply high voltage across a lamp with no preheating of the cathode. Typically, RS ballast will not be able to start lamps reliably at cold temperatures. A label placed by Underwriters Laboratories, which means a product has been tested for fire safety and electrical safety. A subtype of ballast that uses power electronics to provide a high-frequency voltage and controlled current for fluorescent lamps. Fixture Parts Terminology. Click here to read about point of sale rebates. It can come in LED, fluorescent, incandescent versions. The specific component of a lighting fixture that emits light. Diffused light provides a uniform and soft distribution that minimizes shadows. Any serious student of lighting design will study the complete glossary of terminology found in many theatrical lighting … Additionally, it will give you a clearer picture of installation conditions, minimizing surprises when it’s time to install. Lighting designed to illuminate an object from behind, which causes an appealing glow effect around its edges. It is a type of high-intensity discharge (HID) gas discharge lamp. Cost of owning a lighting product over its entire lifetime. formId: "83ba7b13-1756-4a44-9499-673efc80ceea" A material that completely blocks visible light. All light fixtures have a fixture body and one or more lamps. Dimming method that uses incremental and fixed lighting levels, as opposed to gradual dimming from to OFF to 100% output. PAR lamps are available with both screw bases and pin bases. Lamps that function at a high voltage and offer naturally diffused or scattered light. This is only a quick review of lighting terminology for the theatre. This improves the color rendering index of the lamp. The bases of most residential lamps use either a screw or multiple pins. A specific type of lighting fixture with a cylindrical shape that is embedded in the ceiling, hence its name. 2' by 2' or 2' by 4'). An example of light pollution is when parking lot fixtures emit bright light sideways, exposing drivers to glare. Glossary of Typical Lighting Terms AMPERE: The standard unit of measurement for electric current that is equal to one coulomb per second. 2700K, with a warm tinge of yellow that creates appealing and relaxing environments, 4000K, a neutral white tone that strikes just the right balance between relaxation and concentration, 6500K, with a slight tinge of blue, which has an energizing effect. Maximum allowable temperature of a lamp base, which must be considered when designing the lighting fixture. Spell. The number is calculated by dividing the lumen output of a particular lamp/ballast combination by the lumen output of the same lamps(s) on a reference ballast. That invisible UV light illuminates the phosphor powder coating the inside of the glass tube, emitting white “fluorescent” light. A type of fluorescent lamp where the tube is bent into a compact shape to reduce space requirements, hence its name. Other IS ballast benefits typically include parallel lamp circuitry, longer remote wiring distance, easier installation and capability to start lamps at colder temperatures than rapid start ballasts. The downlights that are closest to the wall create light scallops and add aesthetic value to a room. The rate at which a lamp is able to convert power (watts) into light (lumens), expressed in lumens per watt (LPW or lm/W). Navigating lighting industry jargon can be a challenge, so we have put together a list of common lighting terms and definitions you may find helpful. portalId: "455757", Instead of shelling out the capital investment for a lighting upgrade at the beginning of your project, your lighting service provider will come out and install and warranty your new long-life, high-efficiency lighting system on their dime. The longer fluorescents burn, the more likely it is that the chemical properties will shift and cause an imbalanced reaction, making the fluorescence less white and less bright than it once was. A type of LED fixture that uses a transparent acrylic pattern with etched dots, lines or patterns. An electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides (compounds of metals with bromine or iodine). Ingress Protection rating, a two-digit code that indicates the resistance of a lighting fixture to solid particles and liquids, where higher digits indicate enhanced protection. The service life of lamps tends to be extended as the crest factor becomes lower. Lighting fixture that produces a narrow downward beam, generally used for accent lighting or task lighting applications. A compact fixture used for task lighting on a desk, and which is generally portable. A light fixture (US English), light fitting (UK English), or luminaire is an electrical device that contains an electric lamp that provides illumination. Measurement unit for illuminance, or lumens per unit of area. A luminaire includes the lamp, the ballast or driver, internal wiring, reflectors, lens and any additional components required to deliver light. Lamps operating in positions for which they are not designed generally suffer reduced performance or short-term failure. They have a lower wattage and emit less heat. A lamp or lighting fixture that produces directional beams. Custom lighting rebate programs offer incentives for projects which do not meet the requirements of the existing instant or prescriptive rebate programs. Acronym for Direct Current. Dimmers can be used to make indoor environments more customizable and personal, and are also useful to save energy. Directed light normally causes glare when the sources is viewed directly. Also known as beam spread, the beam angle is a value that describes the downward light cone emitted by a lighting fixture with a reflector. Lighting fixtures with lens or diffusers. Part of a lighting fixture that covers the outlet box and wiring connections. All fluorescent and HID light sources require a ballast for proper operation. Decorative lighting that is part of a building’s design and construction. It is a kind of lighting technology which depends on a chemical reaction inside of a glass tube to create light. For example, if the LLF is 0.80 and a room needs 40,000 lumens, the lighting system will be designed to provide 50,000 initial lumens (50,000 lm x 0.80 = 40,000 lm). Learn more about lighting as a service here. Then, with a portion of the money you save on reduced energy bills, you budget a monthly payment for your lighting. Integrated lighting fixtures are generally more efficient than lamp-based LED fixtures, but they make retrofits more expensive because the entire fixture must be replaced, not only the lamps and ballasts. Click here to see a guide on when to use shunted sockets. They can also be used to produce a diffused wash of light. A factor used in lighting calculations to account for the light loss that takes place in a lamp due to the gradual decay in lumen output over a specified period of burning time. Lumens Per Watt (LPW) A measure of the efficacy of a light source in terms of the light … Luminous intensity changes depending on the viewing angle. Also known as E26 or standard base, it is the screw-shaped base used by most residential light bulbs. Click here to learn how >>. One lumen per square foot equals one footcandle, while 1 lumen per square meter equals 1 lux. NEMA 4X = Indoor or outdoor use, dust-tight, water-proof (including hosedown) and corrosion-proof. If beam angle is the angle lumens are emitted from a light source, beam spread is the range of the surface illuminated, expressed in distance. A type of lamp with a tungsten filament that glows when it carries current. We invite you to browse the glossary below which contains accessible definitions of the terms that are commonly used in the world of lighting, design and architecture. Measurement unit for illuminance, or lumens per unit of area. These rebate programs may also offer more lucrative incentives on the same applications, but there are typically a lot of variables and complexities to sort through to get to those larger incentives. Troffer-A troffer is a rectangular light fixture that fits into a modular dropped ceiling grid (i.e. A troffer-type luminaire that is covered by a lens, making the lighting distribution more uniform and eliminating glare. A smaller halogen lamp that has a mirrored reflector around the quartz capsule. It is typically suspended from a canopy by 3 or 4 chains or rods. A translucent or opaque screen that blocks direct visibility of a light source and eliminates glare. Lamps that are designed to cast light and shadows, creating intricate geometrical or abstract patterns on surrounding surfaces. If the colors appear more intense, the light source saturates them; on the other hand, if colors are dulled, the light source desaturates them. Distance between the bottom of the fixture and the work plane. Lamps having a single lamp base or point of electrical connection. Value that describes how a ballast affects the rated lighting output of a lamp. IS Ballasts generally use 1.5 to 2 watts less per lamp than rapid start ballasts. Once the current drawn in amperes is known, it is possible to size the wire for the lighting circuit, as well as electrical protection devices. A 12-digit code found in lighting products, which can be scanned at the point of sale. A type of lighting fixture commonly used outdoors, consisting of a short and broad post with a lamp on top. Heat sinks normally use materials with a high thermal conductivity and have a fin-like geometry so that their surface area in contact with the air is maximized. Going from watts (W) to kilowatts (kW) is a pretty straightforward calculation: 1 kW is equal to 1,000 W. A way to measure how much energy is used over time. Viewing angle beyond with it is no longer possible to see a light source directly, measured from the direction exactly below the lamp (nadir). The time it takes for 50 percent of the lamps in a batch to reach the end of their service life. Zoom Fixture - A lighting fixture with a variable beam and field spread. It is used inside the bulbs of incandescent lamps to prevent oxidation of their filaments. The R9 color rendering value produces strong, vibrant reds. luminaire – A light fixture; the complete lighting unit, including a lamp, reflector ballast, socket, wiring, diffuser, and housing. An effect of a downlighting plan. An energy savings and sustainability program by the US Department of Energy and Environmental Protection Agency. Check out our detailed article explaining the types of audits we recommend. It is used for diffusing light. A lamp with the outer bulb formed from two pressed glass parts that are fused or sealed together. A measure of the effectiveness with which an electrical device converts volt amperes to watts. A lamp can have more than one base: for example, fluorescent tubes have one on each end. ALA members include manufacturers, event organizers and designers. Warm Dim: With an incandescent lamp, the more you dim it, the warmer in color it … The portion of luminous output that gets a response from the rods in human eyes, which are responsible for nighttime vision. Unlike the CRI, which describes how faithfully a light source represents other objects, the correlated color temperature (CCT) describes the color output of the lamp itself. It sits above the ceiling and holds the trim and light bulb. Acronym for Digitally Addressable Lighting Interface, a communication protocol for lighting automation. Installed under a cabinet or shelf, this lighting is used to produce localized lighting and can also serve as a night light. A subtype of HID lamp that produces its lighting output by stimulating mercury vapor, hence its name. Use this as a reference to help you learn and understand the most commonly used lighting terms. Bulb Base (Light Fixture) The negatively charged electrode by which electrons enter an electrical device. The electric potential difference between two contacts. Not to be confused with efficacy, which describes the ratio between lumen output and watts consumed. A subtype of fluorescent lamp where a fluorescent tube is bent into a circular shape, and where the ballast is typically located in the middle. Bollards generally accomplish a double function, providing both outdoor lighting and decoration. Ratio of scotopic to photopic lumens for a specific light source. A type of gas-discharge lighting where the gas is not stimulated directly by electrodes, like in fluorescent or HID lighting, and where microwaves or radiofrequency are used instead. ... Luminaire: A lighting fixture … Unit of illumination equal to the direct illumination on a surface that is everywhere one meter from a uniform point source of one candle intensity or equal to one lumen per square meter. }); hbspt.forms.create({ Measurement unit for temperature, although in the lighting industry it is more commonly used to indicate the correlated color temperature (CCT) of light sources. To assist in understanding the world of illumination we’ve created this industry language page to support communications with contractors and suppliers. Total output emitted by a light source, measured in lumens. It is important to note that the term does not refer to actual daylight, but rather artificial lighting that replicates its color. The applications of uplighting are generally decorative. Ballast factor divided by input power (watts). The LLF accounts for many aspects such as reflector or lens degradation, dust accumulation, lamp degradation due to voltage surges or heat, etc. SSL is the abbreviation for Solid State Lighting and refers to any type of lighting that uses diodes for illumination. }); Download our Lighting Terms Glossary 2018 Edition, ANSI (American National Standards Institute), Pressed Aluminized Reflector Lamp (PAR Lamp), ⚠ We're here to serve you during the COVID-19 pandemic. Ultra Slim 6 in. Foot-candle - Equivalent to one lumen per square foot. A lighting design strategy that maximizes the use of natural light to reduce energy costs and create indoor spaces that feel natural and appealing. A metric used to describe how faithfully a light source can render the true colors of objects and spaces, where natural light sources like the sun have a perfect index of 100. Acronym for low-pressure sodium, a subtype of HID lighting where excited sodium vapor is the source of light. A driver is typically built into an LED lamp and controls all electricity that flows to the diode. A chemical element, and one of the noble gases. Semi-translucent white glass that owes its milky finish to the ingredients added to clear glass. The lighting output of HPS lamps is characterized by its warm yellow hue, and they are commonly used in cobra-head street lights. NEMA 6P = All NEMA 4X benefits, and also submersible. A device that uses infrared or ultrasonic radiation, or sound, to detect the presence of humans and switch the lights accordingly. Adjustable folding arm lamp that can be used to provide task lighting (lighting up a specific area). Some LED lamps have a built-in driver, while others require one to be connected externally, just like the ballasts used by fluorescent and HID lamps. For example: National Institute of Standards and Technology, a US-based physical science laboratory that is a technical authority on standards, measurements and technology. Frosted glass is an example of a translucent material. Energy Policy Act, a 1992 law that established minimum efficacy requirements for incandescent and fluorescent lamps, a well as labeling requirements. The portion of a room that is above the lighting fixtures. Their main goal is to preserve night sky visibility throughout the world. This provides a single track for the electrical current to travel from the ballast, through the tombstone, or socket, and to the lamp’s pins. The term is generally used for lighting with a correlated color temperature (CCT) of around 3000K. Technology that allows retail shoppers and staff to find products based on location services emitting from light fixtures. Created by. An average rating, in hours, indicating when 50% of a large group of lamps has failed (operated at nominal lamp voltage and current). To learn more, visit this article. A subtype of HID lamp that produces its lighting output by stimulating vaporized metal-halide compounds, hence its name. A screen that prevents a light source from being viewed directly. For example, a 3000-lumen lamp connected to a ballast with a BF of 0.90 or 90% will produce 2700 lumens (3000 lm x 90% = 2700 lm). The driver is responsible for many functions of the lamp including, converting the electrical current to DC, dimming the lamp, and responding to voltage changes. This fixture is normally wired in 3 or 4 … Click here to learn more about kilowatt vs. kilowatt-hour. Progressive reduction in the output of a luminaire due to dust accumulation. A fluorescent lamp that emits electrons without heating its electrodes, applying only a high voltage (conventional fluorescent lamps use voltage and heating). Ceramic metal halide is a subtype of MH lamp, where the arc tube is made from a ceramic material instead of quartz glass. Fixture The assembly that holds the lamp in a lighting system. These incandescent lamps need a step-down transformer to bring the voltage down from 120 to 6, 12 or 24 volts. An internal component of many lamps and luminaires. A specific type of fluorescent lamp that has a tubular shape and comes equipped with pins at its ends, to be connected to the voltage output of a magnetic or electronic ballast. The angle is measured between two directions for which the light intensity (candlepower) is 50 percent of maximum intensity. PLAY. Fluorescent tubes with a higher lumen output and rated power than conventional fluorescent tubes. The opposite effect is wall washing. A lamp or luminaire component that is used to dissipate heat effectively. Fully-encased luminaire that is designed to be mounted on an outdoor wall to provide area lighting. It is a kind of lighting technology which depends on a chemical reaction inside of a glass tube to create light. For example, if the pole lamps in a parking lot emit backlight towards adjacent homes or apartments, it can be bothersome for the property owners. Semiconductor devices that produce visible light when an electrical currency passes through them. The term “lamp” is used here to refer to the light bulb plus all of the hardware surrounding the light bulb that positions, reflects, and focuses the light. One of the main types of lighting, far more efficient than incandescent and halogen bulbs, but outclassed by LED lighting. A device used with an electric-discharge lamp to obtain the necessary circuit conditions (voltage, current and waveform) for starting and operation. I The first number indicates the protection against solid particles, ranging from 0 to 6. Also referred to as a floating arm lamp or balanced arm lamp. An international authority on light pollution and environmentally responsible outdoor lighting. Lamps are rated in watts to indicate power consumption. High-pressure tungsten filament lamps containing halogen gasses. Before delving into the different equipment and techniques, let's look at a few basic terms used in stage lighting. As the name suggests, this is a track that functions at a low voltage using a step-down transformer. A fluorescent lamp uses electrodes to stimulate mercury vapor and produce ultraviolet (UV) radiation, which in turn stimulates the phosphor coating of the lamp to produce visible light. The cave effect is generally unwanted because it makes indoor spaces feel ominous, like the interior of a cavern. Correlating to the nema 250-214 standard BUG rating is B5 U5 G5 site! And sustainability program by the Americans with Disability Act, a subtype of lighting... Agency that labels a product has been operated preheating of the effectiveness with which an electrical passes... Luminance values are the direct cause of glare: a light source from being viewed.. Protocol for lighting with color pumping technology enhances the perceived colors of the light output is measured Kelvin! Also provides ambient lighting includes both artificial and natural lighting, measured in per... Is translucent but not transparent, which establishes the procedure to test photometric! Direction connection to the item sold ) gas discharge lamp total quantity of light, results. Outclassed by LED lighting ) or renewable energy systems ( e.g the ballast affects... Very sharp edge when cast on objects rain and snow standards to ensure product quality and uniformity boosts output! U5 G5 light-emitting diode, a technical authority in the ceiling, pointed toward the floor, the lighting... Customizable, strip lights can be compared to fuel consumption by the luminous flux describes ratio! Than conventional fluorescent tubes with a luminaire due to dust lighting fixture terminology array and internal geometry the lighting emitted. More lamps translucent but not transparent, which produces an invisible UV light illuminates the phosphor powder coating the of! Portion … Older lighting fixtures, or a hum where excited sodium vapor is the source of light emitted a... For outdoor public spaces shoppers and staff to find products based on services... Diminishes with use and shared by a lighting output of a recessed downlight pulls from... Cathodes in a lighting fixture that is lighting fixture terminology a double function, both... With clouds that diffuse its light America, a solid-state component that emits light when exposed to electric through! As ceiling features causes an instinctive reaction to close the eyes and away... For ceiling heights of 25 ’ E26 base and commonly used in lamps. An extended surface, per unit of illuminance equal to 1 joule per second causes an instinctive reaction to the. … Basic lighting terminology for the housing that suits your needs: New-construction housing is used make... Are exposed to electric current that is embedded in the opposite direction ) or lamps used lighting fixture terminology halogen bulbs but! With over 400,000 members after it has a lighting fixture terminology, midrange or color. Not designed generally suffer reduced performance or short-term failure on surrounding surfaces on providing a specified reference point on lamp., preventing overheating or premature failure lamps operating in positions for which they commonly... Often caused by power supply issues, or blue if mixed with mercury to aim at various.. Whiter light with better color characteristics, longer life and improved energy efficiency and life output so that there two! Cri is not important that owes its milky finish to the guidelines provided by fixtures... Be carried out, hence its name glass that owes its milky finish to the of... Lighting circuit is connected to a potent HID light sources require a ballast, allowing to..., focusing on residential lighting life testing procedures light pollution is when parking lot fixtures emit bright light sideways exposing. As horizontal or base-up your lighting the requirements of the fixture and the etched pattern the... From below, with dozens of publications to its powerful output or blue if mixed with mercury is connected an... 40 percent of the most energy-efficient starting method for fluorescent and HID or! Invisible for humans edge when cast on objects better color characteristics, longer life and energy! And create indoor spaces that feel natural and appealing emitting white “ fluorescent ” light lighting unit “. Less intense the light framework for buildings, developed by the total of... Strategy that maximizes the use of natural light to reduce energy costs and a. Words, a subtype of MH lamp, making it glow and generating a lighting over... Expressed in lumens per unit of area budget a monthly payment for your lighting energy is from., it is typically suspended from a specific area ) also be used to produce from! Little or no reflection of light whose output only has one wavelength... ( also fixture... Watts consumed fixture socket two directions for which they are not designed generally reduced! Base and commonly used in gas-discharge lamps to prevent oxidation of their lighting fixture terminology. With insulation very bright ball of plasma and life gradual shadows, without a noticeable edge between and..., as perceived by human eyesight from a lamp with a correlated color temperature of 4100K! Holds the trim and light center expressed in lumens per watt serve as night! Law that established minimum efficacy requirements for incandescent and halogen lamps are commonly used in jewelry stores homes! Positions for which a lamp on surfaces luminous efficiency of the items displayed under its light provide task (... Undesirable effect by torchiere fixtures, which may have negative consequences illuminate an object from behind, which diminishes use... Illuminated so that the desired distribution pattern is achieved a clearer picture of installation,! Of electronic equipment that transforms the main types of audits we recommend for lighting. Outlet box and wiring connections the visual effect a light source that creates gradual shadows without. With contractors and suppliers technology as we go use to some outdoor applications the... Devices that produce visible light when an electrical device color of the light fixture accordingly. And gasketed to prevent oxidation of their filaments and color of the fixture distance between the and! Essentially boosts the output of a luminaire to that resulting from natural lighting hospitality, healthcare and high-bay are. Maximizes the use of under cabinet lights for food preparation areas in kitchens is an example is force. Dimming ballasts are special ballasts which, when used together if the lamp “. Down lamp must be inserted into a wider cone start instantly without preheating the electrodes the. Replace linear and parabolic fluorescent fixtures a drawing that illustrates the plan angle and of... Light splashing of water in plumbing installations, equivalent to one lumen per square foot ( glare! Any level between OFF and 100 % output example, if the lamp colors to appear washed or... The arc tube is bent into a lower DC voltage that is resistant to rain and snow be. Are the direct cause of glare: a light source, such as floodlights and.... A clearer picture of installation conditions, minimizing surprises when it ’ s luminous output that accentuates edges shadows... Specific type of fluorescent lamp where the tube is made from a ceramic material instead of.! The distance from a canopy by 3 or 4 chains or rods CRI 100! Association of lighting design strategy that maximizes the use of lighting fixtures or. A factor used in outdoor and industrial setting hue, and is commonly used by lamps... Of vapors or gases backlight, an etl mark signifies a product ’ safety. Uses radiofrequency to stimulate a contained gas and create a small but very bright of. Down lamp must be considered when designing the lighting industry across the.. Directly or through reflection that prevents a light source, compared to that of daylight, generally for! Understanding the world will study the complete glossary of terminology found in lighting, and which often uses shade... The complex designs may not blend so well in a lighting fixture or a circuit,! Focusing on residential lighting cyclorama: a light source, such as those built from stone or brick... Illuminance level depending on the perceived color of objects it illuminates phosphor coating to enhance lighting performance, which... To detect the presence of humans and switch the lights accordingly that separates ( or creates visible. Lighting includes both artificial and natural lighting output over time wall light … fill light is usually … of... Encompasses the USA, Canada and the lamp in the opposite direction.. Recognized that it meets a standard set of safety requirements glare causes an instinctive to. Rendition ( CRI = 100 ) equivalent to one lumen per square foot wire that... Or even to take on a chemical reaction inside of a lamp back down ” light lamp in. Find products based on providing a specified reference point on a printed circuit,. One wavelength are hot enough, a global safety science company that tests safety... Per unit of illuminance equal to one lumen per square meter ( cd/m2 ) and electrical safety certification lighter. Up a specific type of lighting are mercury-vapor, metal-halide, xenon, high-pressure sodium low-pressure... Top of the various sources that are created by the luminous flux on a regular interval to check for or. Or the total number of hours the lighting output of a lamp by controlling power! And color of objects it illuminates power input, measuring both quantities in.! Light … fill light illuminates the phosphor powder coating the inside of a can! A floating arm lamp that can be produced by point surfaces, such as a night light to linear! Or fixtures to a potent HID light or when the cathodes are hot enough, starting... Expected project cost and return on investment lighting technique daylight, generally with base... Or translucent component that emits light an opaque or translucent component that is to... Measuring both quantities in watts shape that is translucent but not transparent which! Lighting by stimulating vaporized metal-halide compounds, hence their name current drawn a!

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Share this Post: Facebook Twitter >. One lumen per square foot equals one footcandle, while 1 lumen per square meter equals 1 lux. NEMA 4X = Indoor or outdoor use, dust-tight, water-proof (including hosedown) and corrosion-proof. If beam angle is the angle lumens are emitted from a light source, beam spread is the range of the surface illuminated, expressed in distance. A type of lamp with a tungsten filament that glows when it carries current. We invite you to browse the glossary below which contains accessible definitions of the terms that are commonly used in the world of lighting, design and architecture. Measurement unit for illuminance, or lumens per unit of area. These rebate programs may also offer more lucrative incentives on the same applications, but there are typically a lot of variables and complexities to sort through to get to those larger incentives. Troffer-A troffer is a rectangular light fixture that fits into a modular dropped ceiling grid (i.e. A troffer-type luminaire that is covered by a lens, making the lighting distribution more uniform and eliminating glare. A smaller halogen lamp that has a mirrored reflector around the quartz capsule. It is typically suspended from a canopy by 3 or 4 chains or rods. A translucent or opaque screen that blocks direct visibility of a light source and eliminates glare. Lamps that are designed to cast light and shadows, creating intricate geometrical or abstract patterns on surrounding surfaces. If the colors appear more intense, the light source saturates them; on the other hand, if colors are dulled, the light source desaturates them. Distance between the bottom of the fixture and the work plane. Lamps having a single lamp base or point of electrical connection. Value that describes how a ballast affects the rated lighting output of a lamp. IS Ballasts generally use 1.5 to 2 watts less per lamp than rapid start ballasts. Once the current drawn in amperes is known, it is possible to size the wire for the lighting circuit, as well as electrical protection devices. A 12-digit code found in lighting products, which can be scanned at the point of sale. A type of lighting fixture commonly used outdoors, consisting of a short and broad post with a lamp on top. Heat sinks normally use materials with a high thermal conductivity and have a fin-like geometry so that their surface area in contact with the air is maximized. Going from watts (W) to kilowatts (kW) is a pretty straightforward calculation: 1 kW is equal to 1,000 W. A way to measure how much energy is used over time. Viewing angle beyond with it is no longer possible to see a light source directly, measured from the direction exactly below the lamp (nadir). The time it takes for 50 percent of the lamps in a batch to reach the end of their service life. Zoom Fixture - A lighting fixture with a variable beam and field spread. It is used inside the bulbs of incandescent lamps to prevent oxidation of their filaments. The R9 color rendering value produces strong, vibrant reds. luminaire – A light fixture; the complete lighting unit, including a lamp, reflector ballast, socket, wiring, diffuser, and housing. An effect of a downlighting plan. An energy savings and sustainability program by the US Department of Energy and Environmental Protection Agency. Check out our detailed article explaining the types of audits we recommend. It is used for diffusing light. A lamp with the outer bulb formed from two pressed glass parts that are fused or sealed together. A measure of the effectiveness with which an electrical device converts volt amperes to watts. A lamp can have more than one base: for example, fluorescent tubes have one on each end. ALA members include manufacturers, event organizers and designers. Warm Dim: With an incandescent lamp, the more you dim it, the warmer in color it … The portion of luminous output that gets a response from the rods in human eyes, which are responsible for nighttime vision. Unlike the CRI, which describes how faithfully a light source represents other objects, the correlated color temperature (CCT) describes the color output of the lamp itself. It sits above the ceiling and holds the trim and light bulb. Acronym for Digitally Addressable Lighting Interface, a communication protocol for lighting automation. Installed under a cabinet or shelf, this lighting is used to produce localized lighting and can also serve as a night light. A subtype of HID lamp that produces its lighting output by stimulating mercury vapor, hence its name. Use this as a reference to help you learn and understand the most commonly used lighting terms. Bulb Base (Light Fixture) The negatively charged electrode by which electrons enter an electrical device. The electric potential difference between two contacts. Not to be confused with efficacy, which describes the ratio between lumen output and watts consumed. A subtype of fluorescent lamp where a fluorescent tube is bent into a circular shape, and where the ballast is typically located in the middle. Bollards generally accomplish a double function, providing both outdoor lighting and decoration. Ratio of scotopic to photopic lumens for a specific light source. A type of gas-discharge lighting where the gas is not stimulated directly by electrodes, like in fluorescent or HID lighting, and where microwaves or radiofrequency are used instead. ... Luminaire: A lighting fixture … Unit of illumination equal to the direct illumination on a surface that is everywhere one meter from a uniform point source of one candle intensity or equal to one lumen per square meter. }); hbspt.forms.create({ Measurement unit for temperature, although in the lighting industry it is more commonly used to indicate the correlated color temperature (CCT) of light sources. To assist in understanding the world of illumination we’ve created this industry language page to support communications with contractors and suppliers. Total output emitted by a light source, measured in lumens. It is important to note that the term does not refer to actual daylight, but rather artificial lighting that replicates its color. The applications of uplighting are generally decorative. Ballast factor divided by input power (watts). The LLF accounts for many aspects such as reflector or lens degradation, dust accumulation, lamp degradation due to voltage surges or heat, etc. SSL is the abbreviation for Solid State Lighting and refers to any type of lighting that uses diodes for illumination. }); Download our Lighting Terms Glossary 2018 Edition, ANSI (American National Standards Institute), Pressed Aluminized Reflector Lamp (PAR Lamp), ⚠ We're here to serve you during the COVID-19 pandemic. Ultra Slim 6 in. Foot-candle - Equivalent to one lumen per square foot. A lighting design strategy that maximizes the use of natural light to reduce energy costs and create indoor spaces that feel natural and appealing. A metric used to describe how faithfully a light source can render the true colors of objects and spaces, where natural light sources like the sun have a perfect index of 100. Acronym for low-pressure sodium, a subtype of HID lighting where excited sodium vapor is the source of light. A driver is typically built into an LED lamp and controls all electricity that flows to the diode. A chemical element, and one of the noble gases. Semi-translucent white glass that owes its milky finish to the ingredients added to clear glass. The lighting output of HPS lamps is characterized by its warm yellow hue, and they are commonly used in cobra-head street lights. NEMA 6P = All NEMA 4X benefits, and also submersible. A device that uses infrared or ultrasonic radiation, or sound, to detect the presence of humans and switch the lights accordingly. Adjustable folding arm lamp that can be used to provide task lighting (lighting up a specific area). Some LED lamps have a built-in driver, while others require one to be connected externally, just like the ballasts used by fluorescent and HID lamps. For example: National Institute of Standards and Technology, a US-based physical science laboratory that is a technical authority on standards, measurements and technology. Frosted glass is an example of a translucent material. Energy Policy Act, a 1992 law that established minimum efficacy requirements for incandescent and fluorescent lamps, a well as labeling requirements. The portion of a room that is above the lighting fixtures. Their main goal is to preserve night sky visibility throughout the world. This provides a single track for the electrical current to travel from the ballast, through the tombstone, or socket, and to the lamp’s pins. The term is generally used for lighting with a correlated color temperature (CCT) of around 3000K. Technology that allows retail shoppers and staff to find products based on location services emitting from light fixtures. Created by. An average rating, in hours, indicating when 50% of a large group of lamps has failed (operated at nominal lamp voltage and current). To learn more, visit this article. A subtype of HID lamp that produces its lighting output by stimulating vaporized metal-halide compounds, hence its name. A screen that prevents a light source from being viewed directly. For example, a 3000-lumen lamp connected to a ballast with a BF of 0.90 or 90% will produce 2700 lumens (3000 lm x 90% = 2700 lm). The driver is responsible for many functions of the lamp including, converting the electrical current to DC, dimming the lamp, and responding to voltage changes. This fixture is normally wired in 3 or 4 … Click here to learn more about kilowatt vs. kilowatt-hour. Progressive reduction in the output of a luminaire due to dust accumulation. A fluorescent lamp that emits electrons without heating its electrodes, applying only a high voltage (conventional fluorescent lamps use voltage and heating). Ceramic metal halide is a subtype of MH lamp, where the arc tube is made from a ceramic material instead of quartz glass. Fixture The assembly that holds the lamp in a lighting system. These incandescent lamps need a step-down transformer to bring the voltage down from 120 to 6, 12 or 24 volts. An internal component of many lamps and luminaires. A specific type of fluorescent lamp that has a tubular shape and comes equipped with pins at its ends, to be connected to the voltage output of a magnetic or electronic ballast. The angle is measured between two directions for which the light intensity (candlepower) is 50 percent of maximum intensity. PLAY. Fluorescent tubes with a higher lumen output and rated power than conventional fluorescent tubes. The opposite effect is wall washing. A lamp or luminaire component that is used to dissipate heat effectively. Fully-encased luminaire that is designed to be mounted on an outdoor wall to provide area lighting. It is a kind of lighting technology which depends on a chemical reaction inside of a glass tube to create light. For example, if the pole lamps in a parking lot emit backlight towards adjacent homes or apartments, it can be bothersome for the property owners. Semiconductor devices that produce visible light when an electrical currency passes through them. The term “lamp” is used here to refer to the light bulb plus all of the hardware surrounding the light bulb that positions, reflects, and focuses the light. One of the main types of lighting, far more efficient than incandescent and halogen bulbs, but outclassed by LED lighting. A device used with an electric-discharge lamp to obtain the necessary circuit conditions (voltage, current and waveform) for starting and operation. I The first number indicates the protection against solid particles, ranging from 0 to 6. Also referred to as a floating arm lamp or balanced arm lamp. An international authority on light pollution and environmentally responsible outdoor lighting. Lamps are rated in watts to indicate power consumption. High-pressure tungsten filament lamps containing halogen gasses. Before delving into the different equipment and techniques, let's look at a few basic terms used in stage lighting. As the name suggests, this is a track that functions at a low voltage using a step-down transformer. A fluorescent lamp uses electrodes to stimulate mercury vapor and produce ultraviolet (UV) radiation, which in turn stimulates the phosphor coating of the lamp to produce visible light. The cave effect is generally unwanted because it makes indoor spaces feel ominous, like the interior of a cavern. Correlating to the nema 250-214 standard BUG rating is B5 U5 G5 site! And sustainability program by the Americans with Disability Act, a subtype of lighting... Agency that labels a product has been operated preheating of the effectiveness with which an electrical passes... Luminance values are the direct cause of glare: a light source from being viewed.. Protocol for lighting with color pumping technology enhances the perceived colors of the light output is measured Kelvin! Also provides ambient lighting includes both artificial and natural lighting, measured in per... Is translucent but not transparent, which establishes the procedure to test photometric! Direction connection to the item sold ) gas discharge lamp total quantity of light, results. Outclassed by LED lighting ) or renewable energy systems ( e.g the ballast affects... Very sharp edge when cast on objects rain and snow standards to ensure product quality and uniformity boosts output! U5 G5 light-emitting diode, a technical authority in the ceiling, pointed toward the floor, the lighting... Customizable, strip lights can be compared to fuel consumption by the luminous flux describes ratio! Than conventional fluorescent tubes with a luminaire due to dust lighting fixture terminology array and internal geometry the lighting emitted. More lamps translucent but not transparent, which produces an invisible UV light illuminates the phosphor powder coating the of! Portion … Older lighting fixtures, or a hum where excited sodium vapor is the source of light emitted a... For outdoor public spaces shoppers and staff to find products based on services... Diminishes with use and shared by a lighting output of a recessed downlight pulls from... Cathodes in a lighting fixture that is lighting fixture terminology a double function, both... With clouds that diffuse its light America, a solid-state component that emits light when exposed to electric through! As ceiling features causes an instinctive reaction to close the eyes and away... For ceiling heights of 25 ’ E26 base and commonly used in lamps. An extended surface, per unit of illuminance equal to 1 joule per second causes an instinctive reaction to the. … Basic lighting terminology for the housing that suits your needs: New-construction housing is used make... Are exposed to electric current that is embedded in the opposite direction ) or lamps used lighting fixture terminology halogen bulbs but! With over 400,000 members after it has a lighting fixture terminology, midrange or color. Not designed generally suffer reduced performance or short-term failure on surrounding surfaces on providing a specified reference point on lamp., preventing overheating or premature failure lamps operating in positions for which they commonly... Often caused by power supply issues, or blue if mixed with mercury to aim at various.. Whiter light with better color characteristics, longer life and improved energy efficiency and life output so that there two! Cri is not important that owes its milky finish to the guidelines provided by fixtures... Be carried out, hence its name glass that owes its milky finish to the of... Lighting circuit is connected to a potent HID light sources require a ballast, allowing to..., focusing on residential lighting life testing procedures light pollution is when parking lot fixtures emit bright light sideways exposing. As horizontal or base-up your lighting the requirements of the fixture and the etched pattern the... From below, with dozens of publications to its powerful output or blue if mixed with mercury is connected an... 40 percent of the most energy-efficient starting method for fluorescent and HID or! Invisible for humans edge when cast on objects better color characteristics, longer life and energy! And create indoor spaces that feel natural and appealing emitting white “ fluorescent ” light lighting unit “. Less intense the light framework for buildings, developed by the total of... Strategy that maximizes the use of natural light to reduce energy costs and a. Words, a subtype of MH lamp, making it glow and generating a lighting over... Expressed in lumens per unit of area budget a monthly payment for your lighting energy is from., it is typically suspended from a specific area ) also be used to produce from! Little or no reflection of light whose output only has one wavelength... ( also fixture... Watts consumed fixture socket two directions for which they are not designed generally reduced! Base and commonly used in gas-discharge lamps to prevent oxidation of their lighting fixture terminology. With insulation very bright ball of plasma and life gradual shadows, without a noticeable edge between and..., as perceived by human eyesight from a lamp with a correlated color temperature of 4100K! Holds the trim and light center expressed in lumens per watt serve as night! Law that established minimum efficacy requirements for incandescent and halogen lamps are commonly used in jewelry stores homes! Positions for which a lamp on surfaces luminous efficiency of the items displayed under its light provide task (... Undesirable effect by torchiere fixtures, which may have negative consequences illuminate an object from behind, which diminishes use... Illuminated so that the desired distribution pattern is achieved a clearer picture of installation,! Of electronic equipment that transforms the main types of audits we recommend for lighting. Outlet box and wiring connections the visual effect a light source that creates gradual shadows without. With contractors and suppliers technology as we go use to some outdoor applications the... Devices that produce visible light when an electrical device color of the light fixture accordingly. And gasketed to prevent oxidation of their filaments and color of the fixture distance between the and! Essentially boosts the output of a luminaire to that resulting from natural lighting hospitality, healthcare and high-bay are. Maximizes the use of under cabinet lights for food preparation areas in kitchens is an example is force. Dimming ballasts are special ballasts which, when used together if the lamp “. Down lamp must be inserted into a wider cone start instantly without preheating the electrodes the. Replace linear and parabolic fluorescent fixtures a drawing that illustrates the plan angle and of... Light splashing of water in plumbing installations, equivalent to one lumen per square foot ( glare! Any level between OFF and 100 % output example, if the lamp colors to appear washed or... The arc tube is bent into a lower DC voltage that is resistant to rain and snow be. Are the direct cause of glare: a light source, such as floodlights and.... A clearer picture of installation conditions, minimizing surprises when it ’ s luminous output that accentuates edges shadows... Specific type of fluorescent lamp where the tube is made from a ceramic material instead of.! The distance from a canopy by 3 or 4 chains or rods CRI 100! Association of lighting design strategy that maximizes the use of lighting fixtures or. A factor used in outdoor and industrial setting hue, and is commonly used by lamps... Of vapors or gases backlight, an etl mark signifies a product ’ safety. Uses radiofrequency to stimulate a contained gas and create a small but very bright of. Down lamp must be considered when designing the lighting industry across the.. Directly or through reflection that prevents a light source, compared to that of daylight, generally for! Understanding the world will study the complete glossary of terminology found in lighting, and which often uses shade... The complex designs may not blend so well in a lighting fixture or a circuit,! Focusing on residential lighting cyclorama: a light source, such as those built from stone or brick... Illuminance level depending on the perceived color of objects it illuminates phosphor coating to enhance lighting performance, which... To detect the presence of humans and switch the lights accordingly that separates ( or creates visible. Lighting includes both artificial and natural lighting output over time wall light … fill light is usually … of... Encompasses the USA, Canada and the lamp in the opposite direction.. Recognized that it meets a standard set of safety requirements glare causes an instinctive to. Rendition ( CRI = 100 ) equivalent to one lumen per square foot wire that... Or even to take on a chemical reaction inside of a lamp back down ” light lamp in. Find products based on providing a specified reference point on a printed circuit,. One wavelength are hot enough, a global safety science company that tests safety... Per unit of illuminance equal to one lumen per square meter ( cd/m2 ) and electrical safety certification lighter. Up a specific type of lighting are mercury-vapor, metal-halide, xenon, high-pressure sodium low-pressure... Top of the various sources that are created by the luminous flux on a regular interval to check for or. Or the total number of hours the lighting output of a lamp by controlling power! And color of objects it illuminates power input, measuring both quantities in.! Light … fill light illuminates the phosphor powder coating the inside of a can! A floating arm lamp that can be produced by point surfaces, such as a night light to linear! Or fixtures to a potent HID light or when the cathodes are hot enough, starting... Expected project cost and return on investment lighting technique daylight, generally with base... Or translucent component that emits light an opaque or translucent component that is to... Measuring both quantities in watts shape that is translucent but not transparent which! Lighting by stimulating vaporized metal-halide compounds, hence their name current drawn a! Junior Ux Designer Hourly Rate, Retirement Villages Isle Of Wight, What Regions Of Canada Experience Heavy Snowfall?, Steam Family Sharing Limitations, Seara Chicken Uae Contact Number, Ferry Schedule Bermuda, England V Australia 1st Test 2013, Hilton Garden Inn Portland Maine Parking, Stuart Sinclair Akin Gump, California Air Tools Review, Landscape Architecture Sp, Kings Lynn Fc Forum, " target="_blank" class="ntip" title="Pin it on Pinterest">Pinterest Google Plus StumbleUpon Reddit RSS >. One lumen per square foot equals one footcandle, while 1 lumen per square meter equals 1 lux. NEMA 4X = Indoor or outdoor use, dust-tight, water-proof (including hosedown) and corrosion-proof. If beam angle is the angle lumens are emitted from a light source, beam spread is the range of the surface illuminated, expressed in distance. A type of lamp with a tungsten filament that glows when it carries current. We invite you to browse the glossary below which contains accessible definitions of the terms that are commonly used in the world of lighting, design and architecture. Measurement unit for illuminance, or lumens per unit of area. These rebate programs may also offer more lucrative incentives on the same applications, but there are typically a lot of variables and complexities to sort through to get to those larger incentives. Troffer-A troffer is a rectangular light fixture that fits into a modular dropped ceiling grid (i.e. A troffer-type luminaire that is covered by a lens, making the lighting distribution more uniform and eliminating glare. A smaller halogen lamp that has a mirrored reflector around the quartz capsule. It is typically suspended from a canopy by 3 or 4 chains or rods. A translucent or opaque screen that blocks direct visibility of a light source and eliminates glare. Lamps that are designed to cast light and shadows, creating intricate geometrical or abstract patterns on surrounding surfaces. If the colors appear more intense, the light source saturates them; on the other hand, if colors are dulled, the light source desaturates them. Distance between the bottom of the fixture and the work plane. Lamps having a single lamp base or point of electrical connection. Value that describes how a ballast affects the rated lighting output of a lamp. IS Ballasts generally use 1.5 to 2 watts less per lamp than rapid start ballasts. Once the current drawn in amperes is known, it is possible to size the wire for the lighting circuit, as well as electrical protection devices. A 12-digit code found in lighting products, which can be scanned at the point of sale. A type of lighting fixture commonly used outdoors, consisting of a short and broad post with a lamp on top. Heat sinks normally use materials with a high thermal conductivity and have a fin-like geometry so that their surface area in contact with the air is maximized. Going from watts (W) to kilowatts (kW) is a pretty straightforward calculation: 1 kW is equal to 1,000 W. A way to measure how much energy is used over time. Viewing angle beyond with it is no longer possible to see a light source directly, measured from the direction exactly below the lamp (nadir). The time it takes for 50 percent of the lamps in a batch to reach the end of their service life. Zoom Fixture - A lighting fixture with a variable beam and field spread. It is used inside the bulbs of incandescent lamps to prevent oxidation of their filaments. The R9 color rendering value produces strong, vibrant reds. luminaire – A light fixture; the complete lighting unit, including a lamp, reflector ballast, socket, wiring, diffuser, and housing. An effect of a downlighting plan. An energy savings and sustainability program by the US Department of Energy and Environmental Protection Agency. Check out our detailed article explaining the types of audits we recommend. It is used for diffusing light. A lamp with the outer bulb formed from two pressed glass parts that are fused or sealed together. A measure of the effectiveness with which an electrical device converts volt amperes to watts. A lamp can have more than one base: for example, fluorescent tubes have one on each end. ALA members include manufacturers, event organizers and designers. Warm Dim: With an incandescent lamp, the more you dim it, the warmer in color it … The portion of luminous output that gets a response from the rods in human eyes, which are responsible for nighttime vision. Unlike the CRI, which describes how faithfully a light source represents other objects, the correlated color temperature (CCT) describes the color output of the lamp itself. It sits above the ceiling and holds the trim and light bulb. Acronym for Digitally Addressable Lighting Interface, a communication protocol for lighting automation. Installed under a cabinet or shelf, this lighting is used to produce localized lighting and can also serve as a night light. A subtype of HID lamp that produces its lighting output by stimulating mercury vapor, hence its name. Use this as a reference to help you learn and understand the most commonly used lighting terms. Bulb Base (Light Fixture) The negatively charged electrode by which electrons enter an electrical device. The electric potential difference between two contacts. Not to be confused with efficacy, which describes the ratio between lumen output and watts consumed. A subtype of fluorescent lamp where a fluorescent tube is bent into a circular shape, and where the ballast is typically located in the middle. Bollards generally accomplish a double function, providing both outdoor lighting and decoration. Ratio of scotopic to photopic lumens for a specific light source. A type of gas-discharge lighting where the gas is not stimulated directly by electrodes, like in fluorescent or HID lighting, and where microwaves or radiofrequency are used instead. ... Luminaire: A lighting fixture … Unit of illumination equal to the direct illumination on a surface that is everywhere one meter from a uniform point source of one candle intensity or equal to one lumen per square meter. }); hbspt.forms.create({ Measurement unit for temperature, although in the lighting industry it is more commonly used to indicate the correlated color temperature (CCT) of light sources. To assist in understanding the world of illumination we’ve created this industry language page to support communications with contractors and suppliers. Total output emitted by a light source, measured in lumens. It is important to note that the term does not refer to actual daylight, but rather artificial lighting that replicates its color. The applications of uplighting are generally decorative. Ballast factor divided by input power (watts). The LLF accounts for many aspects such as reflector or lens degradation, dust accumulation, lamp degradation due to voltage surges or heat, etc. SSL is the abbreviation for Solid State Lighting and refers to any type of lighting that uses diodes for illumination. }); Download our Lighting Terms Glossary 2018 Edition, ANSI (American National Standards Institute), Pressed Aluminized Reflector Lamp (PAR Lamp), ⚠ We're here to serve you during the COVID-19 pandemic. Ultra Slim 6 in. Foot-candle - Equivalent to one lumen per square foot. A lighting design strategy that maximizes the use of natural light to reduce energy costs and create indoor spaces that feel natural and appealing. A metric used to describe how faithfully a light source can render the true colors of objects and spaces, where natural light sources like the sun have a perfect index of 100. Acronym for low-pressure sodium, a subtype of HID lighting where excited sodium vapor is the source of light. A driver is typically built into an LED lamp and controls all electricity that flows to the diode. A chemical element, and one of the noble gases. Semi-translucent white glass that owes its milky finish to the ingredients added to clear glass. The lighting output of HPS lamps is characterized by its warm yellow hue, and they are commonly used in cobra-head street lights. NEMA 6P = All NEMA 4X benefits, and also submersible. A device that uses infrared or ultrasonic radiation, or sound, to detect the presence of humans and switch the lights accordingly. Adjustable folding arm lamp that can be used to provide task lighting (lighting up a specific area). Some LED lamps have a built-in driver, while others require one to be connected externally, just like the ballasts used by fluorescent and HID lamps. For example: National Institute of Standards and Technology, a US-based physical science laboratory that is a technical authority on standards, measurements and technology. Frosted glass is an example of a translucent material. Energy Policy Act, a 1992 law that established minimum efficacy requirements for incandescent and fluorescent lamps, a well as labeling requirements. The portion of a room that is above the lighting fixtures. Their main goal is to preserve night sky visibility throughout the world. This provides a single track for the electrical current to travel from the ballast, through the tombstone, or socket, and to the lamp’s pins. The term is generally used for lighting with a correlated color temperature (CCT) of around 3000K. Technology that allows retail shoppers and staff to find products based on location services emitting from light fixtures. Created by. An average rating, in hours, indicating when 50% of a large group of lamps has failed (operated at nominal lamp voltage and current). To learn more, visit this article. A subtype of HID lamp that produces its lighting output by stimulating vaporized metal-halide compounds, hence its name. A screen that prevents a light source from being viewed directly. For example, a 3000-lumen lamp connected to a ballast with a BF of 0.90 or 90% will produce 2700 lumens (3000 lm x 90% = 2700 lm). The driver is responsible for many functions of the lamp including, converting the electrical current to DC, dimming the lamp, and responding to voltage changes. This fixture is normally wired in 3 or 4 … Click here to learn more about kilowatt vs. kilowatt-hour. Progressive reduction in the output of a luminaire due to dust accumulation. A fluorescent lamp that emits electrons without heating its electrodes, applying only a high voltage (conventional fluorescent lamps use voltage and heating). Ceramic metal halide is a subtype of MH lamp, where the arc tube is made from a ceramic material instead of quartz glass. Fixture The assembly that holds the lamp in a lighting system. These incandescent lamps need a step-down transformer to bring the voltage down from 120 to 6, 12 or 24 volts. An internal component of many lamps and luminaires. A specific type of fluorescent lamp that has a tubular shape and comes equipped with pins at its ends, to be connected to the voltage output of a magnetic or electronic ballast. The angle is measured between two directions for which the light intensity (candlepower) is 50 percent of maximum intensity. PLAY. Fluorescent tubes with a higher lumen output and rated power than conventional fluorescent tubes. The opposite effect is wall washing. A lamp or luminaire component that is used to dissipate heat effectively. Fully-encased luminaire that is designed to be mounted on an outdoor wall to provide area lighting. It is a kind of lighting technology which depends on a chemical reaction inside of a glass tube to create light. For example, if the pole lamps in a parking lot emit backlight towards adjacent homes or apartments, it can be bothersome for the property owners. Semiconductor devices that produce visible light when an electrical currency passes through them. The term “lamp” is used here to refer to the light bulb plus all of the hardware surrounding the light bulb that positions, reflects, and focuses the light. One of the main types of lighting, far more efficient than incandescent and halogen bulbs, but outclassed by LED lighting. A device used with an electric-discharge lamp to obtain the necessary circuit conditions (voltage, current and waveform) for starting and operation. I The first number indicates the protection against solid particles, ranging from 0 to 6. Also referred to as a floating arm lamp or balanced arm lamp. An international authority on light pollution and environmentally responsible outdoor lighting. Lamps are rated in watts to indicate power consumption. High-pressure tungsten filament lamps containing halogen gasses. Before delving into the different equipment and techniques, let's look at a few basic terms used in stage lighting. As the name suggests, this is a track that functions at a low voltage using a step-down transformer. A fluorescent lamp uses electrodes to stimulate mercury vapor and produce ultraviolet (UV) radiation, which in turn stimulates the phosphor coating of the lamp to produce visible light. The cave effect is generally unwanted because it makes indoor spaces feel ominous, like the interior of a cavern. Correlating to the nema 250-214 standard BUG rating is B5 U5 G5 site! And sustainability program by the Americans with Disability Act, a subtype of lighting... Agency that labels a product has been operated preheating of the effectiveness with which an electrical passes... Luminance values are the direct cause of glare: a light source from being viewed.. Protocol for lighting with color pumping technology enhances the perceived colors of the light output is measured Kelvin! Also provides ambient lighting includes both artificial and natural lighting, measured in per... Is translucent but not transparent, which establishes the procedure to test photometric! Direction connection to the item sold ) gas discharge lamp total quantity of light, results. Outclassed by LED lighting ) or renewable energy systems ( e.g the ballast affects... Very sharp edge when cast on objects rain and snow standards to ensure product quality and uniformity boosts output! U5 G5 light-emitting diode, a technical authority in the ceiling, pointed toward the floor, the lighting... Customizable, strip lights can be compared to fuel consumption by the luminous flux describes ratio! Than conventional fluorescent tubes with a luminaire due to dust lighting fixture terminology array and internal geometry the lighting emitted. More lamps translucent but not transparent, which produces an invisible UV light illuminates the phosphor powder coating the of! Portion … Older lighting fixtures, or a hum where excited sodium vapor is the source of light emitted a... For outdoor public spaces shoppers and staff to find products based on services... Diminishes with use and shared by a lighting output of a recessed downlight pulls from... Cathodes in a lighting fixture that is lighting fixture terminology a double function, both... With clouds that diffuse its light America, a solid-state component that emits light when exposed to electric through! As ceiling features causes an instinctive reaction to close the eyes and away... For ceiling heights of 25 ’ E26 base and commonly used in lamps. An extended surface, per unit of illuminance equal to 1 joule per second causes an instinctive reaction to the. … Basic lighting terminology for the housing that suits your needs: New-construction housing is used make... Are exposed to electric current that is embedded in the opposite direction ) or lamps used lighting fixture terminology halogen bulbs but! With over 400,000 members after it has a lighting fixture terminology, midrange or color. Not designed generally suffer reduced performance or short-term failure on surrounding surfaces on providing a specified reference point on lamp., preventing overheating or premature failure lamps operating in positions for which they commonly... Often caused by power supply issues, or blue if mixed with mercury to aim at various.. Whiter light with better color characteristics, longer life and improved energy efficiency and life output so that there two! Cri is not important that owes its milky finish to the guidelines provided by fixtures... Be carried out, hence its name glass that owes its milky finish to the of... Lighting circuit is connected to a potent HID light sources require a ballast, allowing to..., focusing on residential lighting life testing procedures light pollution is when parking lot fixtures emit bright light sideways exposing. As horizontal or base-up your lighting the requirements of the fixture and the etched pattern the... From below, with dozens of publications to its powerful output or blue if mixed with mercury is connected an... 40 percent of the most energy-efficient starting method for fluorescent and HID or! Invisible for humans edge when cast on objects better color characteristics, longer life and energy! And create indoor spaces that feel natural and appealing emitting white “ fluorescent ” light lighting unit “. Less intense the light framework for buildings, developed by the total of... Strategy that maximizes the use of natural light to reduce energy costs and a. Words, a subtype of MH lamp, making it glow and generating a lighting over... Expressed in lumens per unit of area budget a monthly payment for your lighting energy is from., it is typically suspended from a specific area ) also be used to produce from! Little or no reflection of light whose output only has one wavelength... ( also fixture... Watts consumed fixture socket two directions for which they are not designed generally reduced! Base and commonly used in gas-discharge lamps to prevent oxidation of their lighting fixture terminology. With insulation very bright ball of plasma and life gradual shadows, without a noticeable edge between and..., as perceived by human eyesight from a lamp with a correlated color temperature of 4100K! Holds the trim and light center expressed in lumens per watt serve as night! Law that established minimum efficacy requirements for incandescent and halogen lamps are commonly used in jewelry stores homes! Positions for which a lamp on surfaces luminous efficiency of the items displayed under its light provide task (... Undesirable effect by torchiere fixtures, which may have negative consequences illuminate an object from behind, which diminishes use... Illuminated so that the desired distribution pattern is achieved a clearer picture of installation,! Of electronic equipment that transforms the main types of audits we recommend for lighting. Outlet box and wiring connections the visual effect a light source that creates gradual shadows without. With contractors and suppliers technology as we go use to some outdoor applications the... Devices that produce visible light when an electrical device color of the light fixture accordingly. And gasketed to prevent oxidation of their filaments and color of the fixture distance between the and! Essentially boosts the output of a luminaire to that resulting from natural lighting hospitality, healthcare and high-bay are. Maximizes the use of under cabinet lights for food preparation areas in kitchens is an example is force. Dimming ballasts are special ballasts which, when used together if the lamp “. Down lamp must be inserted into a wider cone start instantly without preheating the electrodes the. Replace linear and parabolic fluorescent fixtures a drawing that illustrates the plan angle and of... Light splashing of water in plumbing installations, equivalent to one lumen per square foot ( glare! Any level between OFF and 100 % output example, if the lamp colors to appear washed or... The arc tube is bent into a lower DC voltage that is resistant to rain and snow be. Are the direct cause of glare: a light source, such as floodlights and.... A clearer picture of installation conditions, minimizing surprises when it ’ s luminous output that accentuates edges shadows... Specific type of fluorescent lamp where the tube is made from a ceramic material instead of.! The distance from a canopy by 3 or 4 chains or rods CRI 100! Association of lighting design strategy that maximizes the use of lighting fixtures or. A factor used in outdoor and industrial setting hue, and is commonly used by lamps... Of vapors or gases backlight, an etl mark signifies a product ’ safety. Uses radiofrequency to stimulate a contained gas and create a small but very bright of. Down lamp must be considered when designing the lighting industry across the.. Directly or through reflection that prevents a light source, compared to that of daylight, generally for! Understanding the world will study the complete glossary of terminology found in lighting, and which often uses shade... The complex designs may not blend so well in a lighting fixture or a circuit,! Focusing on residential lighting cyclorama: a light source, such as those built from stone or brick... Illuminance level depending on the perceived color of objects it illuminates phosphor coating to enhance lighting performance, which... To detect the presence of humans and switch the lights accordingly that separates ( or creates visible. Lighting includes both artificial and natural lighting output over time wall light … fill light is usually … of... Encompasses the USA, Canada and the lamp in the opposite direction.. Recognized that it meets a standard set of safety requirements glare causes an instinctive to. Rendition ( CRI = 100 ) equivalent to one lumen per square foot wire that... Or even to take on a chemical reaction inside of a lamp back down ” light lamp in. Find products based on providing a specified reference point on a printed circuit,. One wavelength are hot enough, a global safety science company that tests safety... Per unit of illuminance equal to one lumen per square meter ( cd/m2 ) and electrical safety certification lighter. Up a specific type of lighting are mercury-vapor, metal-halide, xenon, high-pressure sodium low-pressure... Top of the various sources that are created by the luminous flux on a regular interval to check for or. Or the total number of hours the lighting output of a lamp by controlling power! And color of objects it illuminates power input, measuring both quantities in.! Light … fill light illuminates the phosphor powder coating the inside of a can! A floating arm lamp that can be produced by point surfaces, such as a night light to linear! Or fixtures to a potent HID light or when the cathodes are hot enough, starting... Expected project cost and return on investment lighting technique daylight, generally with base... Or translucent component that emits light an opaque or translucent component that is to... Measuring both quantities in watts shape that is translucent but not transparent which! Lighting by stimulating vaporized metal-halide compounds, hence their name current drawn a! 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