If you are looking for local stores that you can buy lights from go for Wal-Mart or any simliar store like that. Buy compact fluorescent lights, they are like $7-10 for a 42 watt bulb. If you can buy online and looking for pretty cheap HPS/MH lights go to http://www.e-conolight.com/Product/E...ductFamilyID=3

I don't think there is any other cheaper site to buy HPS/MH lights from. The only downside to it is that you HAVE TO REWIRE THE LIGHTS YOUR SELF. But there is plenty of tutorials and guides on how to rewire it, its pretty simple. Hope you get what your looking for Peace