A troffer is a rectangular light fixture that fits into a modular
dropped ceiling
A dropped ceiling is a secondary ceiling, hung below the main (structural) ceiling. It may also be referred to as a drop ceiling, T-bar ceiling, false ceiling, suspended ceiling, grid ceiling, drop in ceiling, drop out ceiling, or ceiling tile ...
grid (i.e. 2' by 2' or 2' by 4'). Troffer fixtures have typically been designed to accommodate standard fluorescent lamps (
T12, T8, or T5), but are now often designed with integral
LED
A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresp ...
sources. Troffers are typically recessed sitting above the ceiling grid, but are also available in surface mount 'boxes'. Those with integral LEDs are often known instead as LED light panels.
Use
The troffer is the most common type of light fixture for use in commercial office spaces, schools, and lab facilities.
Etymology
The word 'troffer' is a
portmanteau
In linguistics, a blend—also known as a blend word, lexical blend, or portmanteau—is a word formed by combining the meanings, and parts of the sounds, of two or more words together. of 'trough' and '
coffer'.
References
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Light fixtures