TruePower 1000Watt HPS MH Digital Dimmable Ballast
Up to 30% energy savings compared to transformer technology Operates stably with voltage range from 106 to 260 Volts, 50-60 Hertz, extending bulb life, and in temperatures from -58 Fahrenheit to 122 degrees Hot bulb thermal protection...automatic circuit break until bulb has cooled or 8 minutes has passed Open and short circuit protection  Built in fan cooling and thermal absorbing circuit board foam.Step up digital bulb starting saves bulbs and energy Preset dial downs for 750 or 500 Watt    Generator ready and operates both High Pressure Sodium or Metal Halide bulbs