The Daystar AC is the answer for those wanting high performance coupled with maximum air cooling potential. Utilizing the same patented double wall design and reflective material as our flagship Daystar unit, the "AC" adds a 6 inch built-on flange for cooling air flow from an optional fan. The 6 inch diameter encompasses most of the tunnel-like interior ensuring more complete air flow than common air cooled units. This combination allows for closer plant placement, plus better growth and it improves the ability to control growing area temperatures. •Comes with extension to accommodate a 600 Watt bulb •Comes with lens, instructions, hangers and lighting recommendations •Same incredible performance as the Daystar •6" flanges for straight through fan-powered supercooling capability •Excellent in hotter growing areas •Cooling allows closer to plant growing •CSA Certified Reflector Size: 7-3/8"H x 12-1/2"W x 22-1/2"L Accepts: Sodium 400,430,600, 1000 - Halide 400, 1000