The Master Green? 1000 watt HPS electronic ballast features high frequency 105 kHz micro processing technology optimized for operating double-ended 1000 watt HPS lamps. The Master Green? can operate at 60%, 70%, 100%, or Super Charge. Extruded aluminum housing is lightweight and its compact design has active cooling (internal fan) and soft start technology, which promotes longer lamp life. Our Master Green? electronic ballast lamp cord receptacle is designed specifically for Sun System? brand reflectors. The ballast operates at 120-240 volt power. Includes a 6.5 ft Convertible Smart Volt? dual ferrite, power cord and both 120 volt and 240 volts interchangeable plugs.