Columbia Lighting tradeSELECT® Edge-Lit Flat Panel, Recessed Architectural, 120 to 277 V, 26/30/40 W Fixture, LED Lamp, 125/131/133 Lumens/W Light Output, 54000 hr Average Life, 4000 K Color Temperature, 80 CRI, Acrylic/Frosted Lens, 2800/3300/4000 Lumens, Ceiling Mounting, Extruded Aluminum Housing Material, Matte White Housing Finish, 23.7 in L x 23.7 in W x 1.68 in H Dimensions