A 400 watt system is only $119. Read the specs:

The grow light ballast is a brand new REMOTE 400 watt HPS ballast, with an innovative design that separates the ballast core away from the capacitor and ignitor components to provide high performance and long life. This grow light ballast is made to our specifications with high output lighting results for horticulture / hydroponics / indoor gardening use. The High Pressure Sodium grow light ballast also features a convenient retractable handle with large keyholes for wall or ceiling mounting options. The lighting ballast also has oversized rubber feet for electrical safety and quiet operation. The 8 foot power cord and 10 foot light bulb output cords are constructed of the highest quality, heavy gauge industrial grade electrical cord usually seen on grow lights costing much more. The HPS ballast is pre-set and ready to plug into standard 110/120 household voltage, but can easily be changed to 220/240 volts. The High Pressure Sodium 400 watt High Pressure Sodium grow light ballast will operate any standard or horticultural 400 watt High Pressure Sodium lamps and 400 watt Metal Halide Conversion lamps. The universal socket set can be used with many other reflectors for future upgrades including air-cooled reflectors, umbrella style hoods or many other grow light reflector hoods, making this system a great value in hydroponic and indoor gardening lighting.

High Tech Garden Supply