I purchase a 400watt HPS with a MH conversion bulb set up from HTG supplie in january. It was a good investment as far as i'm concerned. they sent me a free sample of some nutes, a lighter and a upgraded bulb. I search the web to find a cheaper set up and ended up going with 1000bulbs.com There prices are very very low. I bought a 400 watt ballest with bulb igniter, socket and some other piece you need, for 91 with shipping. Lets just say you get what you pay for. The ballest: no case, no plug, a bunch of wires sticking out. I had to wire it together myself. I got it done, but wasn't to comfortable doing it. It works just fine, although being very ugly and looks like a fire hazard. So, if your looking for a cheap set up, either 1000w or 70w and you don't mind doing some set up. Try 1000bulbs.com If you want to take the guess work out and get right to growing, use HTG and still get a good price..