Yield Lab Double Ended Air Cool Hood Grow Light Reflector The Yield Lab Double Ended Air Cool Hood Grow Light Reflector is perfect for warehouse grows, bigger grow tents, and grow rooms looking for lots of light coverage The Air Cool Hood offers a collapsible glass shield for simple bulb removal and replacement; 6" air duct ports for quick bulb and garden cooling; and multiple points of reflection for full and stronger light coverage Compatible with 400w, 600w, 1000w ballasts running from either a 110v (American) or 240v (European) power outlets Its K12x30S Sockets will power 400w, 600w, and 1000w double ended HPS and MH bulbs with no problems Reflector Dimensions: 21.5in.(L) x 20in.(W) x 7in.(H)