Columbia Lighting EPC24-228G-DL-EP115U-F5H835 2ft.x4ft. EPC Full Distribution Luminaire, 2 Lamps, 28W T5, Grid Ceiling, Delta Profile, Static Air Function, Electronic T5, 1.15 Ballast Factor, Programmed Start (N/A T5HO, 1-Lamp), 120V-277V, 35K H Lume