Powermaxx GLSETRS6M Grow Light Digital Dimmable HPS System for Plants with Smart 6" Air Cooled Reflector, 600W 1- 600 watt dimmable electronic fan cooling ballast, acceptable input: 110V - 240V 1- 600-watt super HPS bulb 1 - smart air cooled reflector 24" x 17" x 8" duct size: 6" with hinged glass 1- pair of rope hanger: Weight capacity - 150 lbs. per pair with improved metal internal gears, one click at a time 1- 24 hour timer controller