The ILUMINAR 630W Single-Ended CMH Dual Lamp grow light was engineered to be the closest alternative to natural sunlight. We’ve taken cutting edge agricultural technology to design a ballast that runs efficiently and a reflector that will deliver maximum uniformity -- effectively making this grow light preferred among growers. The CMH ballasts can be run independently or with the ILUMINAR Touch Controller or HASH Controller. The ballasts are also compatible with Priva, Hortimax and Argus controllers (0-10V Protocol), allowing you full control to dial in your gardens to specific requirements. Our CMH Ballast delivers a low frequency, square wave technology in order to provide a constant maximum voltage to the lamp for an extended period of time giving your plants more photons of light. The CMH ballasts are designed to properly ignite and operate on a low frequency ensuring the safety of you and your crop. *WARNING: Only use a low frequency ballast when running CMH lamps. Using a high frequency ballast increases the risk of the lamp exploding and possibly causing injury. Ceramic Metal Halide or “CMH” lamps provide a wider spectrum and more UV light compared to other grow lights. When a larger yield is the desired outcome, the ILUMINAR CMH gives you the competitive edge. This fixture is designed for the Philips 315W CMH ( 930 Agro or 942 ) or the ILUMINAR CMH line of lamps. LAMP SOLD SEPARATELY