HBP-022 22 Inch Prismatic Low Bay Housing Prismetic diffuser to provide direct and indirect light distribution. Lamp Holder E40 porcelain lamp holder IP Rating IP20 for Open Type and IP65 for Close Type Wattage 250 - 400w Gasket Stainless steel gasket Cable High temperature cable andhigh voltage pulse cable where applicable Gear Box Aluminium die-casting gear box. Three models of gear boxes recommended. : GB11 ,GB12 and GB16 Lamp Type1 Metal Halide, High Pressure Sodium , Mercury Application Suitable for height installation and wide area light distribution such as shopping malls , super markets , convenience stores , warehouse , storage.