Columbia Lighting CBT24-LSCS-ELL10 2'x4' Back-Lit Troffer, 5500/4400/3300 Switchable Lumens, 3500/4000/5000K Switchable CCT, Emergency Battery Pack

Columbia Lighting CBT24-75CS-ELL10 2'x4' Back-Lit Troffer, 7500 lumens, 3500/4000/5000K Switchable CCT, Emergency Battery Pack

Columbia Lighting CBT24-75CS 2'x4' Back-Lit Troffer, 7500 Lumens, 3500/4000/5000K Switchable CCT

Columbia Lighting CBT14-LSCS 1'x4' Back-Lit Troffer, 4400/3300/2750 Switchable Lumens, 3500/4000/5000K Switchable CCT

Columbia Lighting 4PS22-340TTG-RAA12-3ETT277-GLR 2'x2' Spec Grade Static Troffer, Three 40W Twin Tube Compact Lamps, Inverted T-Bar Ceiling, White Regressed Alum Door, Acrylic Shield, Instant Start Elec Twin Tube Ballast, 277V, Fast Blow Fuse

Columbia Lighting 4PS22-240TTG-RAA12125-ETTU-GLR 2'x2' Spec Grade Static Troffer, Two 40W Twin Tube Compact Lamps, Inverted T-Bar Ceiling, White Regressed Alum Door, Instant Start Elec Twin Tube Ballast, 120-277V, Fast Blow Fuse