Growzilla" Dual Bulb Air Coolable Reflector Combine spectrums of both Halide and Sodium in one reflector! " Up to 290,000 lumens  THE ULTIMATE ingrowing power " Mix/Match Sodium & Halide, Lower Wattage /Higher Wattage " Compatible with all Hydrofarm cord setsand ballast enclosures " Air coolable  includes flanges and lens REFLECTOR SIZE 9 3D8"H x 21"W x 21"L FAN Fan required