2 Terms
Contributors in Lighting
Lighting
compact fluorescent
Construction; Lighting
A small fluorescent lamp that is often used as an alternative to incandescent lighting. The lamp life is about 10 times longer than incandescent lamps and is 3-4 times more efficacious.
optics
Construction; Lighting
A term referring to the components of a light fixture (such as reflectors, refractors, lenses, louvers) or to the light emitting or light-controlling performance of a fixture.
diffuser
Construction; Lighting
A translucent piece of glass or plastic sheet that shields the light source in a fixture. The light transmitted throughout the diffuser will be redirected and scattered.
preheat
Construction; Lighting
A type of ballast/lamp circuit that uses a separate starter to heat up a fluorescent lamp before high voltage is applied to start the lamp.
arc tube
Construction; Lighting
A tube enclosed by the outer glass envelope of a HID lamp and made of clear quartz or ceramic that contains the arc stream.
baffle
Construction; Lighting
A single opaque or translucent element used to control light distribution at certain angles.
color rendering index (CRI)
Construction; Lighting
A scale of the effect of a light source on the color appearance of an object compared to its color appearance under a reference light source. Expressed on a scale of 1 to 100, where 100 indicates no ...
