Ulti-Lumenx GLK600CTH 600 Watt Grow Light Digital Dimmable HPS MH System for Plants 6" XL Air Cool Tube Hood Set 600 Watt Dimmable Electronic Fan Cooling Ballast; Acceptable input: 110v - 240v. Dimmable Option: 50%, 75% & 100% HPS Bulb: Lumen - 89,000 Air Cool Tube: 30" x 25" x 7" Duct Size: 6" Made of Glass & German Aluminum Pair of Rope Ratchet : Weight Capacity - 150 lbs per pair w/ Improved Metal Internal Gears; One Click at a Time