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One style of track lighting with two lamps that can be aimed. Track lighting is a method of lighting where light fixtures are attached anywhere on a continuous track device which contains electrical conductors. [1] [2] This is in contrast to directly routing electrical wiring to individual light positions.
A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as lamps, and all the accessory components required for its operation to provide illumination to the environment. [1] All light fixtures have a fixture body and one or more lamps.
The Argand lamp was introduced to Thomas Jefferson in Paris in 1784 and according to him gave off "a light equal to six or eight candles." [ 4 ] These new lamps, much more complex and costly than the previous primitive oil lamps, were first adopted by the wealthy, but soon spread to the middle classes and eventually the less well-off as well.
MR lamps were originally designed for use in slide projectors, but see use in residential lighting and retail lighting as well. They are suited to applications that require directional lighting such as track lighting , recessed ceiling lights , desk lamps, pendant fixtures , landscape lighting , retail display lighting, and bicycle headlights.
Usage includes theatrical lighting, locomotive headlamps, aircraft landing lights, and residential and commercial recessed lights ("cans" in the United States). Many PAR lamps are of the sealed beam variety, with a parabolic reflector , one or more filaments , and a glass or plastic lens sealed permanently together as a unit.
When installed it appears to have light shining from a hole in the ceiling, concentrating the light in a downward direction as a broad floodlight or narrow spotlight. Different types of recessed lighting in a warehouse "Pot light" or "canister light" implies the hole is circular and the lighting fixture is cylindrical, like a pot or canister.
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