Columbia Lighting EPC24-228G-CV-EP95U-F5H835 2'x4' EPC Full Distribution Luminaire, 2 Lamps, 28W T5, Grid Ceiling, Static Air Function, Electronic T5, 0.95 Ballast Factor , Programmed Start (N/A T5HO, 1-Lamp), 120V-277V, 35K High Lumen T5 Lamps Inst