Ultragrow UG/BA1000 Convertible Grow Light Ballast. This top-quality ballast controller is designed to provide a reliable power source for your grow lights, without compromising on safety and functionality. With a maximum wattage of 1000W and support for both 120V and 240V voltages, this ballast is compatible with a wide range of grow lighting setups. This convertible is for sale as not tested no cords with it