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 (trŏf′ər, trô′fər)
An inverted, usually metal trough suspended from a ceiling as a fixture for fluorescent lighting tubes.

[Alteration of trough.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


an electric light fixture shaped like a shallow inverted trough, which holds in place and reflects light from a fluorescent tube or tubes
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
GlacialLight will be displaying its latest energy-efficient LED lighting solution, including: LED flood lights, LED bay lights, LED panel lights, LED troffer lights, LED down lights (including DL06-IP waterproof IP54), and LED wall-mounted luminaires.
The MAX Grow family of LED lighting products includes the MAX 600, MAX 400 and the MAX 200 troffer style lights that can easily be suspended using a simple chain and hook.
LSI Industries released its SLI LED Side Light Recessed Troffer with a performance of up to 6012 lumens at 102 LPW.
Usually spaces are planned with a 2X4 troffer grid at 8- by 10-feet or a linear system on 12-foot center spacing.
A range of troffer, linear and downlight fixtures also include occupancy/vacancy sensors as well as a wireless programmer and wireless wall controls.
GlacialLight will be displaying its whole range of LED lights, including: LED flood lights, LED bay lights, LED panel lights, LED troffer lights, LED down lights, AR111 V2 series LED lamps, and track lights.
GlacialLight will be featuring their recently released products including: the patented TL0606 troffer light with hanging, on-ceiling and in-ceiling mounting options; the waterproof DL06IP down light with IP54; and the DALI (Digital Addressable Lighting Interface) control board.
For small offices, wide open areas, and narrow corridors, the Stratus, which combines the architectural style and performance of an indirect fixture with the easy installation of a recessed troffer, is ideal for ceilings too low for suspended fixtures.
West Caldwell, NJ, March 07, 2013 --( MaxLite[R] introduces the LED RKT Series Recessed Troffer Retrofit Kit and LED RKL Retrofit Kit Strips, as economical easy-to-install upgrades to LED lighting that require minimal modifications to the existing recessed troffer housing.
This is a common occurrence with old-style direct recessed troffer systems that typically bathe the workspace in overly bright, energy-wasting illumination.
This material, listed by Underwriters Laboratories (UL) with a UL 94 V-0 rating at 1.5 mm, was used to produce a high-performing LED Troffer Reflector featuring 12 LEDs for Fraen's Optics Division.