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'. Those with integral LEDs are often known instead as LED light panels.
Suspended ceiling
Use
LED troffer to retrofit fluorescent troffer
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 of 'trough' and 'coffer'.[1]
gollark: Anyway, WhatsApp is *allegedly* end to end encrypted, but you can't verify that.
gollark: It's several tens of megabytes or something.
gollark: And the giant wildly inefficient app.
gollark: Google has no coherent strategy and deprecates their stuff every 1204712μs though.
gollark: I assume the Android version is something unpleasant like Google Hangouts.
References
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