The Xtrasun Dimmable Digital Ballast is an ideal ballast for commercial or residential growing. Created with state-of-the-art microprocessor technology, this super-boosted ballast's extruded aluminum body and cooling fins mean it will stand up to the toughest conditions. Available in both a 600 watt and 1,000 watt version, each Xtrasun operates on a 120V/208V/240V, 50/60 Hz power supply and supplies four-mode dimming. For efficiency, the Xtrasun line of ballasts includes built-in hot restrike programming to protect your lamp and ballast in the event of the ballast turning off unexpectedly, such as in a power outage. Choose the Xtrasun ballast for a super-reliable, generator-ready way to dissipate heat with fan-powered cooling.