thats what i thought to but i spent like 2 weeks looking everywhere for the best price and the best stuff and i found the best deal on ebay. If your looking for a complete set up check out this item:
http://cgi.ebay.com/DIGITAL-INLINE-A...em380079740261
comes with digital ballast hps bulb and mh bulb and one of the best reflectors you can buy. It was the best deal i could find by far. i got him to drop the price to $160. Its worked wonders for me