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A common form of home task lighting is a goose-neck lamp or swing arm light fixture. The adjustable neck allows light to be focused on the exact task needed, and the swing-arm wall sconces can be positioned next to a bed or chair, and adjusted to shine light on a printed page. Free standing, adjustable desk lamps are commonly used in home ...
The light of the candle flame was often intensified by a reflecting backplate. Using brackets, the candle or gas flame would be kept at safe distance from the wall and ceiling. [3] Modern electric light fixture sconces are often used in hallways or corridors to provide both lighting and a point of interest in a long passage. Sconce height in a ...
Rock crystal began to be replaced by cut glass in the late 17th century. [8] and examples of chandeliers made with rock crystal as well as Bohemian glass can be found in the Palace of Versailles. [44] Crystal chandeliers in the early period were literally made of crystals, but what are called crystal chandeliers now are almost always made of ...
An important property of light fixtures is the luminous efficacy or wall-plug efficiency, meaning the amount of usable light emanating from the fixture per used energy, usually measured in lumen per watt. A fixture using replaceable light sources can also have its efficiency quoted as the percentage of light passed from the "bulb" to the ...
The "warmer" light colors, such as a 2700 K incandescent bulb or a 1700 K candlelight, are more easily reproduced than more neutral white lights, such as 4800 K direct sunlight, and thus usually have higher CRI ratings in alternative light sources such as CFL and LED bulbs; "warmer" light (redder) naturally renders colors less accurately.
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