The Lumatek 1000w Digital Ballast is a state of the art digital lighting ballast and is the best currently available today. 30% more lumens than a standard magnetic ballast, and yet uses much less energy. Featuring 4 different settings, including Super Lumens - the Lumatek 1000w can be used progressively to give the optimum performance for each stage of your grow and can be used with both high pressure sodium or metal halide lamps.
eBay