Professional adjustable high frequency electronic ballasts. Only suitable for use with EL lamps: no acoustic resonance, up to 8% more grow light compared to traditional lamps, light maintenance after 5000 hours >95%. Microprocessor controlled with electronic safety circuit. Driver efficiency at full power is 95-96%. Gavita Pro 1000 has adjustable output to 600/660/750/825/1000/1150 watts. Sealed housing with Gore-Tex ventilation plug. Equipped with an industry standard XR505 connector for plug and play installation with your favorite reflector. Operate at 240 volts.