RLM Radial Wave Dome, Industrial Grade Reflector, Signature Fixture of The RLM Series Measurements Diameter:20"Height: 7-1/2" Special Features This dome is made of 18 gage, cold-rolled steel and coated with genuine powder coat or an exquisite plated finish. Ballast Options FluorescentMetal HalideIncandescentHigh Pressure SodiumNote: A150HPS always requires a remote box (cat# 884RTE or 884SCE) Notes Max Suggested Wattage: 200