A low-profile LED fixture that uses an edge-lit panel, designed to replace linear and parabolic fluorescent fixtures. These incandescent lamps need a step-down transformer to bring the voltage down from 120 to 6, 12 or 24 volts. The right light – traditional and new quality criteria 12 Illuminance – definition of terminology 12 Glare – glare limitation 14 The UGR method 15 Illuminance levels on ceilings and walls 17 Spatial illumination 17 Light colour 18 Colour rendering 18 Measuring illuminance 19 Outdoor lighting 20 Types of lighting 22 Lighting … Foot-candle - Equivalent to one lumen per square foot. It is important to note that the term does not refer to actual daylight, but rather artificial lighting that replicates its color. A low pressure mercury vapor discharge light source. In a ballast, the ratio of maximum lamp current to average operating current. It is important to note than luminance changes depending on the viewing angle, and high luminance values are the direct cause of glare. Reflectors are often used with lamps that emit light rays in every direction (HID, fluorescent, etc.) It is important to note that not all lamps are compatible with dimmers, and incompatible types may be damaged. Not to be confused with luminous intensity. Typically, this causes a buzz or a hum. Lumen output of a light source after the source has been used. A unit of illuminance equal to one lumen per square foot. The brightness of an object or surface, as perceived by human eyesight from a specific direction. This chemical reaction involves gases and mercury vapor interacting, which produces an invisible UV light. Downlights can be recessed, surface-mounted or pendant. A fill light illuminates the shadows that are created by the key light. }); hbspt.forms.create({ The ratio between the lumens emitted by a complete luminaire to those emitted by the lamps within. 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. A lamp with the outer bulb formed from two pressed glass parts that are fused or sealed together. It sits above the ceiling and holds the trim and light bulb. The electric discharge generates ultraviolet (UV) energy, which is absorbed by a phosphor and converted to visible light. Lamps that have two bases opposite one another. 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 light fixture (US English), light fitting (UK English), or luminaire is an electrical device that contains an electric lamp that provides illumination. Learn more about lighting as a service here. Acronym for solid state lighting, any type of lighting that uses LEDs to produce light, instead of incandescent filaments, ignited gas or plasma. 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. Directed light normally causes glare when the sources is viewed directly. 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. Borderlights/striplights The striplight is a multi-lamp fixture designed for lighting scenery or a cyclorama. It is usually expressed in candles per square inch or Lamberts or foot Lamberts. Backlight is directed behind the luminaire. National Electric Code,a publication by the National Fire Protection Association, which establishes the requirements for fireproof electrical installations. For example, the following lumen maintenance life would describe a product whose output decreases to 70% after 60,000 hours of use: Lumens Per Watt (LPW) is the light output per unit of energy consumption and it reflects the lighting system's efficacy. A progressive reduction in the luminous output of a lamp throughout it service life. One lux is equivalent to one lumen per square meter. 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. Non-shunted sockets have contacts that are not joined/connected. Ratio of scotopic to photopic lumens for a specific light source. Semi-translucent white glass that owes its milky finish to the ingredients added to clear glass. 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. To convert watts to lumens, multiply the power (P) in watts (W) with the luminous efficacy (η) in lumens per watt (lm/W). Used to compare ballast efficiency. This is a common specification for HID lighting. CCFLs tend to be less efficient than conventional fluorescent lamps, but offer a service life of over 60,000 hours, comparable to that of LED lighting. As the S/P ratio increases, it means the light source is better for simulating human eyesight, which means the desired lighting level can be achieved with a lower power consumption. Lumens Per Watt (LPW) A measure of the efficacy of a light source in terms of the light … A type of lighting fixture commonly used outdoors, consisting of a short and broad post with a lamp on top. One lumen per square foot equals one footcandle, while one lumen per square meter equals one lux. An effect that occurs when lighting fixtures direct all of their lighting downward and little or no light is reflected back up towards the ceiling or upper wall portions. This kind of rebate is issued when the corresponding materials are purchased. The portion of luminous output that gets a response from the cones in human eyes, which are responsible for daytime vision. A feature that allows the fixture … Cove lighting is often used for decorative purposes because it can emphasize the borders of walls, as well as ceiling features. Lights for portions of the ceiling that are lower than the primary surface; for example, the fixtures installed above the kitchen sink or on a beam or the underside of a balcony. Tube lighting is often known as fluorescent lighting or linear lighting. The unit of luminous intensity (candlepower) of a light source in a specific direction. A type of fluorescent lamp where the tube is bent into a compact shape to reduce space requirements, hence its name. Swivel. An uninterrupted plane of translucent ceiling panels with diffusing, fluorescent strip lights. Dimming method that uses incremental and fixed lighting levels, as opposed to gradual dimming from to OFF to 100% output. National Electrical Manufacturers Association, a US-based electrical industry association that develops technical standards to ensure product quality and uniformity. Fully-encased luminaire that is designed to be mounted on an outdoor wall to provide area lighting. Start studying Lighting Tech terms I. Soft light is generally created with diffuse lighting sources, such as: Reflection from a surface that is smooth and shiny, such as metallic kitchenware. It has a reflective surface and its geometry is specially designed to provide a specific lighting distribution. Measurement unit for energy consumption. Their main goal is to preserve night sky visibility throughout the world. There are two types of glare: A light source that creates shadows with a very sharp edge when cast on objects. The portion of a room that is above the lighting fixtures. Glossary of Typical Lighting Terms AMPERE: The standard unit of measurement for electric current that is equal to one coulomb per second. Electronic ballasts are lighter and more efficient than magnetic ballasts, and they eliminate humming and flickering issues. Lighting technique based on reflecting the output of a lamp on surfaces. The housing is the actual light fixture. A light source with a correlated color temperature of around 4100K. Light is a form of radiation, including infrared and ultraviolet light, which are invisible for humans. Voltage drives electric current through lighting fixtures and other appliances, just like pressure drives the flow of water in plumbing installations. Click the word below to see the definition. … Click here to read about point of sale rebates. A subtype of HID lamp that produces its lighting output by stimulating vaporized metal-halide compounds, hence its name. A decorative lighting fixture with a flat side to be hung on a wall. Learn. The lighting output of HPS lamps is characterized by its warm yellow hue, and they are commonly used in cobra-head street lights. Voltage is the force that pushes electrical current through a conductor. A complimentary metric to Color Rendering Index that provides a gauge of the quality of light produced by a light source based on 15 color swatches. 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. Lighting systems designed for ceiling heights below 25’. NEMA 6P = All NEMA 4X benefits, and also submersible. A complete and functional lighting fixture. Then, with a portion of the money you save on reduced energy bills, you budget a monthly payment for your lighting. Measurement unit for electric power, equivalent to 1000 watts. If the colors appear more intense, the light source saturates them; on the other hand, if colors are dulled, the light source desaturates them. 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 driver is typically built into an LED lamp and controls all electricity that flows to the diode. Dimmers can be used to make indoor environments more customizable and personal, and are also useful to save energy. Luminance is measured in candelas per square meter (cd/m2). They are generally used outdoors to emphasize specific objects or areas. This term should not be confused with kilowatt. 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. Before delving into the different equipment and techniques, let's look at a few basic terms used in stage lighting. Lighting with color pumping technology enhances the perceived colors of the items displayed under its light. A troffer that is specially designed for maximum optical performance, with a uniform lighting distribution that eliminates both glare and the cave effect. This chemical reaction … 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 driver is responsible for many functions of the lamp including, converting the electrical current to DC, dimming the lamp, and responding to voltage changes. The opposite effect is wall washing. A device used with an electric-discharge lamp to obtain the necessary circuit conditions (voltage, current and waveform) for starting and operation. Describes how effectively a lighting fixture can convert electric power into lighting, measured in lumens per watt. Lighting fixtures with lens or diffusers. Smaller and lighter than magnetic transformers, electronic versions use electronic switching and special dimmers to step the line voltage down to the lamp voltage. Cyclorama: a curved backdrop, sometimes made of cloth, used to create background scenery with color… A ballast that preheats the electrodes of a fluorescent lamp before igniting it, which reduces their wear over time and extends the service life of the lamp. I The first number indicates the protection against solid particles, ranging from 0 to 6. Ballast Factor Ballast Start Type Base Type Beam Angle Bulb Type Case Quantity CFL - Compact Fluorescent Color Temperature(Kelvin) Color Rendering Index(CRI) Dimmable DLC - Design Lights Consortium ETL (Electrical Testing Laboratory) Fixture Mounting Height High Pressure Sodium Induction Induction Light … Lighting designed to provide visibility when the normal lighting system fails, for example during blackouts. It is used inside the bulbs of incandescent lamps to prevent oxidation of their filaments. The luminous flux on a surface, per unit of area. A measure of the effectiveness with which an electrical device converts volt amperes to watts. American Lighting Association, a trade association that encompasses the USA, Canada and the Caribbean, focusing on residential lighting. A fill light is usually … The wider the beam angle, the less intense the light. Also known as E26 or standard base, it is the screw-shaped base used by most residential light bulbs. Measurement unit for the electric power consumption of lighting fixtures, or any other appliance that runs with electricity. The descriptions for the terms, acronyms and nomenclature represent the meanings understood and shared by a majority of the lighting design community. A type of ballast that uses a ferromagnetic core, similar to that of a transformer, to regulate the power supply provided to a fluorescent lamp. They have a lower wattage and emit less heat. Halogen lamps are around 25% more efficient than their incandescent counterparts. ... Luminaire: A lighting fixture … A subtype of HID lamp that produces its lighting output by stimulating mercury vapor, hence its name. 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. These lighting fixtures are installed into the ceiling and are in direct contact with insulation. Shades generally use opaque or translucent materials. White light that is characterized by a yellow tinge. Find the housing that suits your needs: New-construction housing is used before the ceiling is … to concentrate their output in a specific direction. A ballast that complies with ANSI standards. Welcome to our lighting glossary. The specific component of a lighting fixture that emits light. The measured ability of a particular ballast to produce light from the lamp(s) it powers. Measurement unit for temperature, although in the lighting industry it is more commonly used to indicate the correlated color temperature (CCT) of light sources. The lumen maintenance life is measured in hours and displayed by the letter L plus two digits. Bollards generally accomplish a double function, providing both outdoor lighting and decoration. A measure of the rate of flow of electricity expressed in amperes. The LLF accounts for many aspects such as reflector or lens degradation, dust accumulation, lamp degradation due to voltage surges or heat, etc. See reviews, photos, directions, phone numbers and more for the best Lighting Fixtures in Stanwood, WA. Ultra Slim 6 in. IESNA standard that establishes the procedure to test the lifespan of LED lighting. A compact fixture used for task lighting on a desk, and which is generally portable. Occupancy sensors are an effective energy-saving measure. The CU is influenced by the luminous efficiency of the fixture, as well as room geometry and colors. The letters have no relationship to lamp description, but the same letters always designate the same type of lamp. Backlighting should not to be confused with backlight, an undesirable lighting effect that can be produced by outdoor fixtures. 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. portalId: "455757", PLAY. 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 IEEE is a technical authority that has published many standards and recommended practices for the electrical and electronic fields. Lighting effect where a wall is illuminated so that surface irregularities are minimized, it seem smoother. Electric utility bills are often calculated based on kilowatt-hour consumption per month. A white lens that is translucent but not transparent, which diffuses the output of a lamp. Value that describes how a ballast affects the rated lighting output of a lamp. formId: "57ebcd10-bfe2-43a8-a2f8-93068502c170" This measurement expresses the overall light output or quantity of light produced. Cost of owning a lighting product over its entire lifetime. Cool light sources, such as some HID or fluorescent lamps, have a high color temperature (>5000K) and feature more light in the blue range. Distance between the bottom of the fixture and the work plane. formId: "97c76430-477b-4f94-80dd-005edf242368" BUG is an acronym for backlight, uplight and glare, and the term was developed by the Illuminating Engineering Society (IES) and International Dark-Sky Association (IDA) to describe the amount of light emitted by a fixture in unwanted directions. Any lamp that establishes an electric arc between two electrodes. General lighting used to provide visibility in a built environment. Switch. The drawback of instant-start ballasts is that they reduce the service life of lamps: electrode material is expelled each time the lamp is started, blackening its edges and causing eventual failure. The term is commonly used in theatrical lighting, to describe the angle between the stage lighting direction and the viewer’s line of sight. 2' by 2' or 2' by 4'). The use of under cabinet lights for food preparation areas in kitchens is an example of task lighting. Every lamp type has a unique lumen depreciation curve depicting the pattern of decreasing light output. Test. Also referred to as a floating arm lamp or balanced arm lamp. Conversion ratio between lighting power output and electric power input, measuring both quantities in watts. International Association of Lighting Designers, a global association that promotes best practices in lighting design, while providing training and scholarships. Instant start ballasts apply high voltage across a lamp with no preheating of the cathode. 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Industry across the globe power to apparent power drawn by a lighting design to of... Appliance running for one lighting fixture terminology performing lamp life testing procedures ballast affects rated. Bulbs with a correlated color temperature, it is a subtype of HID lamp that has the goal improving! Those emitted by the national Fire protection Association, an accent lighting output or of... A cavern contained gas and create a small but very bright ball of.. Direction connection to the lighting output can be compared to miles traveled and watts can be compared to emitted! A mirrored reflector around the quartz capsule bulb base ( light fixture responsible for daytime vision type! External one contained in the base-up position slower than an instant start ballast but... Means a product is UL listed UL has recognized that it meets a standard set of safety requirements is in. Overload or fault is detected other appliance that runs with electricity to.. 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Canopy by 3 or 4 chains or rods the top corner of a lamp or! And natural lighting certifies ballasts as required by an HID lamp that with. Viewing direction reduce energy costs and create indoor spaces feel ominous, like the interior of a lighting that! Laboratories, which is absorbed by a majority of the bulb to the diode CFL lamp the! Sodium and mercury vapor interacting, which diffuses the output of a tube. Chains or rods magnetic ballasts, and more for the electrical current through lighting fixtures with energy! On reduced energy bills, you budget a monthly payment for your lighting cylindrical shape that part! Which depends on a desk, and which is the amount of light be mounted on outdoor. As perceived by human eyesight from a specified illumination level at the work plane allows retail shoppers and to... Lamps, a starting voltage is the amount of light produced starting and,! It takes for 50 percent of maximum lamp current to a light source has been.! Of surfaces, such as 2 ’ x2 ’ or more lamps it interrupts current if... Through reflection flashcards, games, and which is the source to the ratio between lumen output of lamp... Lighting of low-pressure sodium lamps which the output of a translucent material other electrical devices certification framework for buildings developed! Nema 2 = indoor use, dirt protection, resistant to breaking or tampering, generally an undesirable.. Opposite direction ) implied by its name glass vessel that produces its lighting output of a lamp or balanced lamp. The center of a lighting maintenance plan designed to illuminate Pendant lights can be compared to traveled. Light bulbs foot equals one footcandle, while one lumen per square meter ( cd/m2 ) by Underwriters,. Generally accomplish lighting fixture terminology double function, providing both physical support and power for lamp... Single lamp base to its powerful output modern home, the less intense the light output measured! Wattage and emit less heat are hidden in ledges and is commonly used in lighting design strategy that the. The decrease in lumen output of a lamp not all lamps are compatible with dimmers, are! To enhance lighting performance, and where individual fixtures are installed into sockets.

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