all I know is I bought a light system for 190. its a 400w HPS system with the ballast and the hood then I bought the Metal Halide conversion bulb(for veg) all included. I mean its sounds expensive at 1st but when you start looking around at prices and if you want to get serious you should invest in 1. The odds are you are prob. gonna end up buying 1 anyway so just avoid all the extra wasted money on the CFLs and buy it.. I believe they say a 400w HPS/MH covers a 4x4 space and my space is 3x4 so thats good for me. And try getting Mylar instead of foil, if you do want to use foil remember to use the DULL SIDE OUT TOWARDS THE PLANTS and the shinny side towards the wall.