I have a 70 watt high pressure sodium, a 150 watt HPS and a 175 watt Metal halide. Paid $15 for the 70 watt back when I first started to grow.Got it at Lowes on the discount rack. I would use that with an arsenal of cfl's LOL. Then I got the 175 watt on craigslist for $30 buck just had to...