A quality 400 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 400 or 250 watt bulbs, plus has a "Super Lumens" setting that works on the 400 watt setting to give you 10% more light. The bulb is a 400 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.