We don't have synonyms for troffer yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are proffer and throffer.
(n) :
A rectangular, trough-shaped light fixture, typically for mounting in or on a ceiling to light the area below, and usually containing two or three fluorescent bulbs.
(n) :
A rectangular, trough-shaped light fixture, typically for mounting in or on a ceiling to light the area below, and usually containing two or three fluorescent bulbs.