Okay, HPS and MH lights are damn expencive when you include the ballast as far as I can tell. I looked on 1000bulbs.com and put a Hortilux 400 watt HPS bulb + 400 watt balast in my shopping cart... $150. Also, the ballast is large and not that great for space in my situation. Perhaps I could use a non specialty 400 watt HPS bulb (2100k, 50,000 lumens) which costs $12, and would bring the total amount to around $80.
I know wear you can get a full HPS kit 600 watt, bulb ,ballast and screws and chains to hang it and an adjustable reflecter for $119.00.