The LightEnerG™ Premium HPS Ballast is a versatile magnetic ballast capable of switching between voltages with ease. Simply use either the 120 V or 240 V power cord (available separately) to change the voltage of the ballast without the need for any additional wiring. Its aluminum housing is specially designed to dissipate heat and keep components cool, and includes a top-of-the-line Aerovox® capacitor. This ballast is also compatible with 600 W metal halide (MH) conversion lamps and the lamp cord receptacle accepts all LightEnerG lamp cords and reflectors.