High Bay Fluorescent 4 lamp T6 High Output, universal voltage ballast (120 volt). High output T6, 4 lamp, with Miro-4 Polished aluminum reflectors. See out complete line of T6 High Output lamps (4500-5000 lumens per lamp - 3000K, 5000K, 5500K Full Spectrum, 6500K, and Aquarium Lamps. Galvanized steel H body, light weight, low profile. Dimensions - width- 14.38" x Length - 48" x Height - 3.25". Mounting Options: 4 Point (#101 HC), 2 Point Chain Mount (# 202 or 203HC), 2 Point Stem Mount, Surface Mount (no accessories required), Sing Point Mount (# 62HBD). UL Listed.