RLM Classic Dome, Industrial Grade Shade, Classic Elegance and Simplicity of Design Measurements Diameter: 12"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 Sodium ballast requires a remote box(cat# 884RTE or 884SCE) Notes Max. Suggested Wattage: 150Neck Type: #4