COLUMBIA LIGHTING, CBT14-A-LSCS-EDD-ELL14, Indoor Troffer, Backlit, Series: CBT, 120 to 277 V, 24 to 48 W Fixture, LED Lamp, 60000 hr Average Life, White Light, 3500/4000/5000 K Color Temperature, 80 CRI, 0 to 10 V Dimming Ballast, Frosted Lens, 4400/3300/2750 Lumens, Surface Mounting, Steel Housing Material, 2 in H x 47.8 in W x 11.9 in L Dimensions,