Lithonia Lighting 2GT8 432A121201/4GESB Troffer Light [Misc.] 48"L x 24"W x 3-3/16"H 120 volts GESB ballast-commercial electronic ballast/approved for residential use sku no. 3016342 For use in lay-in ceilings Takes 4-48" T8 lamps (not included)