Exposed ballast design is compact and runs cool! Hard Core? offers superior cooling capabilities while extending the longevity of the capacitor and ignitor. Dual universal lamp cord receptacle is compatible with all Sun System? brand reflectors as well as other branded reflectors. Powder-coated steel housing with louvered venting and solid design helps protect internal components. Rubber feet reduce noise & vibration. Excellent ballast quality with high temp 150?C wire connections will provide years of trouble-free operation. Removable stainless steel handles allow easy handling. Ballast is hardwired with an eight foot 277 volt power cord including a L7-15p twist lock plug.