For maximum yields, the 600W Omega Ballast will deliver. The very latest in cutting-edge Ballast technology, this high-quality ballast offers a dimmable power output to the bulb, which will protect the grow lamps lifetime whilst assisting to reduce power consumption - making it super-efficient. Choose from 4 dimmable options: 250w, 400w, 600w and including the super-lumen setting which increases the output to 660w. Ideal for powering HPS Lamps and Dual Spectrum Lamps. They offer the user the ability to control power output to the lamp, which not only protects the lifetime of the lamp, but it also helps to reduce growing costs. Features 10% super lumen setting. Uses soft start technology, with no lamp flicker or noise. 30% more efficient than Magnetic Ballasts.