An acoustic sensor that measures distances by sending and receiving ultrasonic signals. 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. n. 1 the act or quality of illumination or ignition. Luminance is measured in candelas per square meter (cd/m2). 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’). 2 the apparatus for supplying artificial light effects to a stage, film, or television set. A type of CFL lamp where two parallel fluorescent tubes share the same base. The dull yellow lighting of low-pressure sodium lamps is an example of monochromatic light. Put it this way: if you’re hoping that switching to a smart LED lighting system is going to save you so much in energy bills it’ll pay for itself in no time, you’re going to be disappointed. Lighting control systems are widely used on both indoor and outdoor lighting of commercial, industrial, and residential spaces. 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. The descriptions for the terms, acronyms and nomenclature represent the meanings understood and shared by a majority of the lighting design community. 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. See the full definition for lighting in the English Language Learners Dictionary. In a ballast, the ratio of maximum lamp current to average operating current. Directed light normally causes glare when the sources is viewed directly. The opposite effect is wall washing. Some examples of HID lighting are mercury-vapor, metal-halide, xenon, high-pressure sodium and low-pressure sodium lamps. It is used for diffusing light. Measurement unit for temperature, although in the lighting industry it is more commonly used to indicate the correlated color temperature (CCT) of light sources. Also known as E39 base, it is larger than the medium E26 base and commonly used by HID lamps. A compact fixture used for task lighting on a desk, and which is generally portable. lighting - the craft of providing artificial light; "an interior decorator must understand lighting" interior design , interior decoration - the trade of planning the layout and furnishings of an architectural interior A compact lighting fixture that directs its output downward, hence its name. A lamp or lighting fixture that produces directional beams. Light is a form of radiation, including infrared and ultraviolet light, which are invisible for humans. Viewing angle beyond with it is no longer possible to see a light source directly, measured from the direction exactly below the lamp (nadir). 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). A type of lighting fixture that offers superior energy efficiency, by using a specially-designed LED array and internal geometry. A transparent casing that contains a light source, generally made from glass. Lighting products with the ENERGY STAR have been tested for superior energy efficiency. Lighting fixture that produces a narrow downward beam, generally used for accent lighting or task lighting applications. Lamps that function at a high voltage and offer naturally diffused or scattered light. tmClass. Several different configurations are available: ALSF I (Approach Lighting System with Sequenced Flashing Lights) is used on Category I runways during instrument landing approach to align the aircraft with the centerline of the runway and to establish vertical orientation. A 12-digit code found in lighting products, which can be scanned at the point of sale. 11.0 Lighting System 11.1 Overview This chapter describes the interior and exterior lighting system that shall be provided on all car types. 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 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. In lighting, lumens can be compared to miles traveled and watts can be compared to fuel consumption. SSL Acronym for solid state lighting, any type of lighting that uses LEDs to produce light, instead of incandescent filaments, ignited gas or plasma. It is important to note that the term does not refer to actual daylight, but rather artificial lighting that replicates its color. It is important to note that not all lamps are compatible with dimmers, and incompatible types may be damaged. Distance between the bottom of the fixture and the work plane. American National Standards Institute, a publisher of standards for US products and services. Clear glass is a translucent material. The operating position for which a lamp is designed. Dimming method where the lamp output can be adjusted at any level between OFF and 100% output, without incremental steps. A key component of lighting designed is achieving a suitable illuminance level depending on the application at hand. Lighting systems designed for ceiling heights below 25’. White light that is characterized by a yellow tinge. Disability glare impairs vision, but does not cause the same reaction as discomfort glare. Institute of Electrical and Electronics Engineers, a global professional association with over 400,000 members. Reflective fixtures direct all the lighting downward (so that there is little or no reflection of light back in the opposite direction). The term ‘lighting’ refers to equipment, the primary purpose of which, is to produce light. One lux is equivalent to one lumen per square meter. Cove lighting is often used for decorative purposes because it can emphasize the borders of walls, as well as ceiling features. Any lighting output emitted in unwanted directions, which may have negative consequences. Escape route lighting: Position and Minimum horizontal illuminance at floor level on centre line of escape route. International Association of Lighting Designers, a global association that promotes best practices in lighting design, while providing training and scholarships. 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. For instance, one button press can turn on six dimmers, each to the ideal brightness for the task at hand, whether it is relax-ing with a book, watching a movie, or cleaning . Utilizing retractable functionality, this recessed downlight pulls down from the ceiling to aim at various angles. 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. Magnetic ballast are heavier and less efficient than their electronic counterparts, and issues with flickering or humming are common. In gardening, the lighting system refers to an artificial light source which is designed to replicate plant growth and development. Lighting system load transfer switches automatically transfer selected lights from normal to life safety or critical branches of the essential electrical system when the devices sense loss of normal power. Lighting effect where a wall with an irregular surface is illuminated so that there are both highlighted and shaded areas. IESNA standard that establishes the procedure to test the lifespan of LED lighting. Technology Trends. Lamps operating in positions for which they are not designed generally suffer reduced performance or short-term failure. Lighting systems from Philips help people feel comfortable, productive, and safe.They beautify spaces and transform environments.Our lighting systems combine world-class traditional and LED luminaires with analog and digital controls that let you to deliver exactly the right illumination experiences, whenever and wherever you need them. Since lumens describe lighting output better than watts, efficacy tends to be a much more useful concept in lighting design. 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. They generally come with standard bases that fit into the sockets found in compatible fixtures. 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. Soft light is generally created with diffuse lighting sources, such as: Reflection from a surface that is smooth and shiny, such as metallic kitchenware. High Definition lighting systems . 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. Lighting effect where a wall is illuminated so that surface irregularities are minimized, it seem smoother. Generally, electrical lighting is powered by acentrally generated electrical power. These systems plug into a grounded outdoor outlet, and use a transformer to step the household current down to a current level that is safer for outdoor use. 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. Lamps or lights are vital for a lighting system and offer efficient lighting. Ambient lighting includes both artificial and natural lighting, and does not include task lighting and accent lighting. To convert watts to lumens, multiply the power (P) in watts (W) with the luminous efficacy (η) in lumens per watt (lm/W). A piece of glass or acrylic that has the purpose of scattering the light from a bulb, which results makes lighting more uniform and eliminates glare. An internal component of many lamps and luminaires. The beam angle is measured between the downward direction, where the lamp provides maximum lighting intensity, and the direction in which intensity drops to 50%. Some of the most common types are PAR20, PAR30 and PAR38. See Pendant Light / Pendant Fixture / Pendant Lamp. Backlighting is a type of accent lighting, and is commonly used to draw attention to works of art. Lights that operate at a lower voltage than the standard household voltage. The electric potential difference between two contacts. The FAA awarded a contract in June 2010 to conduct a feasibility study for implementing the LED lamps … Each of the modules connected to one management console that acts as the main processor of the whole systems. 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. MALSR (Medium Intensity Approach Lighting System with Runway Alignment Indicator Lights) is used by pilots during instrument landing approach to align the aircraft with the centerline of the runway. Lighting system power shall include all lighting system components shown or provided for on the plans (including lamps and ballasts and task and furniture-mounted fixtures). Dimming method that uses incremental and fixed lighting levels, as opposed to gradual dimming from to OFF to 100% output. Troffers typically have predetermined dimensions, such as 2’x2’ or 2’x4’. One foot-candle is equivalent to one lumen per square foot (See Illuminance). Lighting systems designed for ceiling heights of 25’ or more, commonly found in sports complexes, warehouses or industrial locations. Most landscape lighting operates on low voltage systems. Ratio of real power to apparent power drawn by lighting fixtures and other electrical devices. 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. A cash incentive for a purchase. All types of HID lamps produce lighting by stimulating an enclosed gas with an electric arc, and therefore they operate at high temperatures. An opaque or translucent component that blocks direct sight of a lighting source. For example, an IP67 rating indicates a higher degree of protection than an IP54 rating. 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. Lux - Equivalent to one lumen per square meter. Also referred to as dimmer switches, light transformers are electrical devices that are used to change the voltage of a circuit to make the light dimmer or brighter. SSL includes OLEDs. Progressive reduction in the output of a luminaire due to dust accumulation. Lighting system meet the following requirements: Please circle âCâ for Compliance or âEâ for Exception. Backlight is directed behind the luminaire. The CU is influenced by the luminous efficiency of the fixture, as well as room geometry and colors. It is important to note than luminance changes depending on the viewing angle, and high luminance values are the direct cause of glare. We’re building the future of lighting, one luminaire at a time. 3 the distribution of light on an object or figure, as in painting, photography, etc. Many newer control systems are using wireless mesh open standards (such as ZigBee ),  which provides benefits including easier installation (no need to run control wires) and interoperability with other standards-based building control systems (e.g. Power travels along the circuit to energize a group of lights. 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. Leadership in Energy and Environmental Design, a resource efficiency certification framework for buildings, developed by the US Green Building Council. NEMA 4X = Indoor or outdoor use, dust-tight, water-proof (including hosedown) and corrosion-proof. A luminaire includes the lamp, the ballast or driver, internal wiring, reflectors, lens and any additional components required to deliver light. Electric utility bills are often calculated based on kilowatt-hour consumption per month. LPS lights have a very high efficacy, but their color rendering performance is very poor. This effect is only possible on walls with granular surfaces, such as those built from stone or exposed brick. It includes the sales price, installation cost, energy consumption, maintenance, component replacements and decommissioning cost. Arc lamps generally stimulate a gas, making it glow and generating a lighting output. Lighting output of a new lamp, which diminishes with use. NEMA 6P = All NEMA 4X benefits, and also submersible. A type of lamp base that connects with the socket using keyways instead of threads. It has a reflective surface and its geometry is specially designed to provide a specific lighting distribution. Voltage drives electric current through lighting fixtures and other appliances, just like pressure drives the flow of water in plumbing installations. Electronic ballasts are lighter and more efficient than magnetic ballasts, and they eliminate humming and flickering issues. A subtype of HID lamp that produces its lighting output by stimulating vaporized metal-halide compounds, hence its name. 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. A portion of lighting is always lost due to internal geometric features and reflection. A type of electromagnetic radiation, invisible to the human eye (i.e., beyond the visible spectrum) with a wavelength of 10 to 380 nanometers. Mercury lamps may use a phosphor coating to enhance lighting performance, and are commonly used in outdoor and industrial lighting applications. Smaller and lighter than magnetic transformers, electronic versions use electronic switching and special dimmers to step the line voltage down to the lamp voltage. Illuminating Engineering Society of North America, a technical authority in the lighting industry, with dozens of publications to its credit. Fluorescent tubes with a higher lumen output and rated power than conventional fluorescent tubes. This is the type of glare felt when exposed to a potent HID light or when the sun is directly visible through a window. Measurement unit for luminous intensity, which is the amount of light emitted in a particular direction. Canopies often have decorative features. Measurement unit for illuminance, or lumens per unit of area. Acronym for solid state lighting, any type of lighting that uses LEDs to produce light, instead of incandescent filaments, ignited gas or plasma. They have a lower wattage and emit less heat. Switching A type of lamp with a tungsten filament that glows when it carries current. Acronym for low-pressure sodium, a subtype of HID lighting where excited sodium vapor is the source of light. Lamp or luminaire component that has the goal of dispersing the lighting output so that the desired distribution pattern is achieved. Define Lighting system. The fraction of a lamp’s luminous output that reaches the work plane. Definition - What does lighting system mean? solar panels). Electric utility companies normally apply additional charges if the power factor of a building drops below a specified level. A lighting system upgrade, generally with the goal of improving energy efficiency and site safety. Lighting where more than 90% of the light goes directly from the source to the area you wish to illuminate. Light produced by an extended surface, either directly or through reflection. Therefore, the best possible BUG rating is B0 U0 G0, and the worst possible rating is B5 U5 G5. An example is the lighting provided by torchiere fixtures, which emit their beam towards the ceiling to be reflected back down. Measurement unit for illuminance, or lumens per unit of area. Depending on their internal construction, ballasts can be either magnetic or electronic. A recessed lighting fixture, designed to be installed in an opening in the ceiling. U-bend lamps generally have two bases, one on each end, which attach to different lampholders. The intended use of a lighting product. The specific component of a lighting fixture that emits light. Time required by an HID lamp to achieve full brightness after it has been turned off. The sun, when covered with clouds that diffuse its light. PAR is an acronym for parabolic aluminized reflector, and it is used to shape the output of a light bulb into a directional beam. Temperature ( CCT ) of around 3000K energy-efficient technologies ( e.g and exterior lighting 11.1. 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Has published many standards and recommended practices for the control thereof incremental fixed... Direct all the lighting industry, with a uniform and soft distribution that eliminates both glare the... An IP67 rating indicates a higher lumen output and rated power than conventional fluorescent tubes have one on end... Of CFL lamp where the CRI is not important technique based on reflecting the output of a lighting over! Incandescent versions direction, generally between 5500K and 6500K authoritative organization in the,!