Columbia Lighting EPC24-228G-CV-EP115U-F5835 2'x4' EPC Full Distribution Luminaire, 2 Lamps, 28W T5, Grid Ceiling, Static Air Function, Electronic T5, 1.15 Ballast Factor, Programmed Start (N/A T5HO, 1-Lamp), 120V-277V, 35K 85CRI T5 or T5HO Lamps Install