A quality 600 watt Sodium System complete with a 120/240 volt Lumatek Multi-Wattage Electronic Ballast and Xtrasun 6 Air Coolable Reflector with 6" flanges. The Lumatek Ballast can run 600 or 4000 watt bulbs, plus has a "Super Lumens" setting that works on the 600 watt setting to give you 10% more light. The bulb is a 600 watt Solarmax. Simple, easy to set up and use, the quality components of this system make this a great value for your money. The ballast can run either a HPS bulb or a MH bulb. A great system for the more experienced grower who wants to get move on up and get more versatility from their light system.