HBA-134 485mm Aluminium High Bay Housing Aluminiumreflector to provide high efficiency direct light distribution. Lamp Holder E40 porcelain lamp holder IP Rating IP20 for Open Type and IP65 for close Type Wattage 250-400w Gasket Weather proof and durable silicone rubber Cable High temperature cable and high voltage pulse cable where applicable Gear Box Aluminium dia-casting gear 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.