Galaxy Electronic remote ballasts are available with a wide choice of Sunlight reflectors. Galaxy electronic remote ballasts featurs an extruded aluminum housing that will never rust and has excellent heat dispensation qualities. Electronic ballasts run cooler, are lightweight, energy effecient and will operate both metal halide and HPS lamps. Simply switch HPS and metal halide lamps in the reflector during the appropriate growing stage and grow all year long. Choose a 400W 120V-240V, 600W 120V-240V, or 1000W 120V, and 1000 240V lighting system. Galaxy ballasts have a 3-year full and additional 2-year prorated warranty.