The 1000W HPS/MH Hot Head Magnetic Ballast is great for the grower on a budget! It features a compact design and blue powder coated steel housing. This switchable magnetic ballast is compatible with 1000W MH and HPS bulbs (make a selection using the switch) and runs at 120V or 240V. The universal reflector receptacle makes this ballast compatible with most major brand reflectors, and the convenient carrying handles allow for easy transportation. The attached metal feet allow you to use this ballast on a flat surface or mount it on walls. UL listed components.