HYDROFARM Xtrasun 1000W Digital Ballast, 120-240V Dimmable Xtrasun e-ballasts 1000W Dimmable 120-240v 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 ballasts extruded aluminum body and cooling fins mean it will stand up to the toughest conditions. Input Voltage: 120V, 208V or 240V Four-mode dimming: super, 100%, 75%, and 60% Internal rf shielding