RLM Standard Dome, Industrial Grade Shade, Nostalgic Elegance and Simplicity of Design Nostalgic Elegance and Simplicity of Design Measurements Diameter: 20"Height: 13" 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 Metal HalideFluorescentIncandescentHigh Pressure Sodium Note: A150HPS always requires a remote box(cat#884RTE or 884SCE) Notes Max. Sugested Wattage: 300Neck Type: #2 ?