Professional 600 watt high frequency electronic ballast. Including high efficiency Miro aluminum horticultural HortiStar HR96 reflector (95% efficiency). Only suitable for use with 600 watt EL lamp (included). No acoustic resonance, up to 8% more grow light and light maintenance after 5000 hrs >95%. Microprocessor controlled. Driver efficiency >95%. Sealed housing with Gore-Tex ventilation plug. Reflector easily replaceable. Very low heat dissipation and very low weight. LED status indicator. Operates at 240 V. Comes with 8 ft power cord. 1 year warranty on the lamp.