Troffer

A troffer is a rectangular light fixture that fits into a modular dropped ceiling 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 sources. Troffers are typically recessed sitting above the ceiling grid, but are also available in surface mount 'boxes'.

+==Use=== The troffer is the most common light fixture for use in commercial office spaces, schools, and lab facilities.

Trivia

The word 'troffer' comes form the combination of the words trough and coffer.