The Growzilla Dual Bulb Reflector allows you to mix and match your Sodium and Halide bulbs, from 400 watt to 1000 watt and can get up to 290,000 lumens - THE ULTIMATE in growing power! This reflector is compatible with all Hydrofarm cord sets and ballast enclosures. It is air coolable and includes flanges and lens. Measurements: 9-3/8"H x 21"W x 21"L