You can pick up a decent 600 watt set up for around 200 bucks that will come with a digital ballast, MH and HPS bulbs and a fixture to hang it.. have a look around on ebay or even craigslist kinda sites.. there are some pretty good deals out there! 150 watts of hps wouldnt be bad.. but 600 would be MUCH better ;-) for the extra few bucks.. its well worth it imo... cheers!