This is an LEC (light emitting ceramic) ballast and shade combination that has a double bulb configuration at a very low price. It runs 2 x LEC 315W bulbs (not included) and is designed for large canopies while still providing excellent penetration.
The single housing provides 2 x 315 Watt ballasts to power the CMH (ceramic metal halide) lamps for a total of 630 Watts of growing power. It's made from high quality aluminum and brings the high efficiency of LEC technology with a replaceable reflector.