I have grown with both and I will tell you there is a great difference. My yeild with fluro's almost nothing. HPS 400 watt 4 OZ's from 6 plants and HPS 100watt cheap light 6 OZ's. I'm trying a hortilux 1000 eye HPS now and the yeild will be much greater. The big Z says. If you go cheap you grow cheap. Sorry if that's all you can use.