Fluorescent High Bay Fixture, Lamp Quantity 4, Lamp Type T8, Suggested Lamp Item No. 2ETU3, Fixture Wattage 146W, Voltage 120 to 277VAC, Description/Special Features Heat Slots, Length 48-1/16 In., Width 13-1/4 In., Height 2-3/8 In., Light Distribution Wide, Reflector Type White, Reflector Material Aluminum, Mounting Height 15 to 25 ft., Space to Mtg. Height Ratio 1.27, Lamp Watts 32W, Ballast Type Electronic Instant Start, Ballast Quantity 2