Ratio of real power to apparent power drawn by lighting fixtures and other electrical devices. As implied by its name, it is equivalent to the amount of energy consumed by a one-kilowatt appliance running for one hour. Lighting fixture used to provide outdoor area lighting, where the lamp is found on top of a pole, often with a reflective housing that achieves a characteristic lighting pattern. Also referred to as a floating arm lamp or balanced arm lamp. Lighting with color pumping technology enhances the perceived colors of the items displayed under its light. The lighting output of outdoor fixtures that is emitted opposite to the intended direction, generally an undesirable effect. An older ballast that regulates electricity incrementally. Lighting fixtures with lens or diffusers. A type of CFL lamp where two parallel fluorescent tubes share the same base. One foot-candle is equivalent to one lumen per square foot (See Illuminance). Leadership in Energy and Environmental Design, a resource efficiency certification framework for buildings, developed by the US Green Building Council. Just like watts, kilowatts is a measure of how much energy something will consume. 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 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. Lighting effect where a wall with an irregular surface is illuminated so that there are both highlighted and shaded areas. Lighting designs are generally based on providing a specified illumination level at the work plane. Some lamps are specified or designed to be operated in certain positions, such as horizontal or base-up. A lighting fixture that is designed to hang from the ceiling, and which often uses a shade to prevent glare. Accent lighting is also useful in retail applications, where it can be used to draw attention to specific products and make them seem more appealing. The portion of luminous output that gets a response from the rods in human eyes, which are responsible for nighttime vision. Energy Policy Act, a 1992 law that established minimum efficacy requirements for incandescent and fluorescent lamps, a well as labeling requirements. A numeric code that describes the degree of protection offered by an enclosure, according to the NEMA 250-214 standard. Lighting fixture that produces a narrow downward beam, generally used for accent lighting or task lighting applications. U-bend lamps generally have two bases, one on each end, which attach to different lampholders. Fluorescent tubes are designated by the letter “T” followed by a number indicating its diameter in 1/8ths of an inch: Fluorescent tubes come in standard lengths, where the some of the most common are 24” (2’), 48” (4’) and 96” (8’). The wider the beam angle, the less intense the light. Wallpacks are available in HID, CFL and LED versions. In lighting installations, wiring and protections are calculated based on the amperes drawn by the lighting circuits, as well as their rated voltage. Lamps having a single lamp base or point of electrical connection. mlaro. Highly directional lighting fixtures such as floodlights and spotlights. Direct lighting from a concentrated source is generally hard light, and some examples are: An improved version of incandescent lamps, where the glowing filament is contained in halogen gas, hence its name. Flashcards. A lamp base that uses two pins, as implied by its name. All light fixtures have a fixture body and one or more lamps. Some common CCT values include: Although the correct technical term is correlated color temperature, it is often shortened to only color temperature. The portion of luminous output that gets a response from the cones in human eyes, which are responsible for daytime vision. Louver A series of baffles arranged in a geometric pattern used both to shield a light source from an unwanted viewing angle and to redirect the remaining light to a more usable location. Troffer fixtures have typically been designed to accommodate standard fluorescent lamps (T12, … Not to be confused with the lumen (lm), measurement unit for the total lighting output of a lamp or fixture, without describing a particular direction. 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. The term comes from the fact that light sources at this color temperature value do not have the characteristic yellow hue of incandescent bulbs or warm white LED lamps. Lamps that generate light by the application of electrical current to a tungsten filament. Halogen lamps also provide brighter, whiter light with better color characteristics, longer life and improved energy efficiency. A tungsten wire positioned inside an incandescent or halogen lamp, that when heated electrically generates radiation in the visible, infrared and ultraviolet ranges. portalId: "455757", The intensity of light at the center of a reflector lamp beam (expressed in candelas). A subtype of HID lamp that produces its lighting output by stimulating mercury vapor, hence its name. It is also important to note that the CCT is not the real operating temperature of a lamp - it is the temperature to which you would have to heat a black body to make it glow with the same color. Beam is the narrowest, spot is a little wider, wash is the widest, and hybrid could be any combination of those three. The part of a lighting fixture that provides support and power for a lamp with a matching base. It sits above the ceiling and holds the trim and light bulb. Smaller and lighter than magnetic transformers, electronic versions use electronic switching and special dimmers to step the line voltage down to the lamp voltage. This is often used in jewelry stores or homes as accent lighting. The luminous flux describes the total lighting output of a lighting fixture without considering direction. Lighting that is installed above the upper edge of windows, where an opaque panel blocks direct vision of the fixture and the light is directed upward and downward as a result. Emergency lighting is equipped with batteries, allowing it to operate long enough for a building to be evacuated. The ratio between the lumens emitted by a complete luminaire to those emitted by the lamps within. This effect is only possible on walls with granular surfaces, such as those built from stone or exposed brick. A physical property of surfaces, equivalent to the ratio of reflected light to incident light. This advancement in LED lighting essentially boosts the output of a certain spectrum of light. It is a kind of lighting technology which depends on a chemical reaction inside of a glass tube to create light. Ultra Slim 6 in. formId: "83ba7b13-1756-4a44-9499-673efc80ceea" American National Standards Institute, a publisher of standards for US products and services. A type of fluorescent lamp where the tube is bent into a compact shape to reduce space requirements, hence its name. Prescriptive lighting rebate programs are not designed to be claimed instantly. A chemical element, and one of the noble gases. One lumen per square foot equals one footcandle, while 1 lumen per square meter equals 1 lux. A troffer-type luminaire that is covered by a lens, making the lighting distribution more uniform and eliminating glare. Lux - Equivalent to one lumen per square meter. Downlights can be recessed, surface-mounted or pendant. A lamp with the outer bulb formed from two pressed glass parts that are fused or sealed together. Light produced by heating a material; Examples include the glow of a candle, an incandescent filament lamp, a shooting star, etc. The measurement of light and its properties. NEMA 6P = All NEMA 4X benefits, and also submersible. The opposite effect is wall grazing. The letters have no relationship to lamp description, but the same letters always designate the same type of lamp. A type of fluorescent lamp where the tube is bent in a U shape, hence its name. Built into a socket with the energy STAR have been tested for superior energy,! 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