i fnd that the combined spectrum of the enhanced HPS bulb, added with the awesome vegging of a 200, 6400K CFL makes for a very stocky plant, with a better range of lighting and par... it works best for me, and the heat is easy to control... but thars just my preferance.. the cfl, I got the whole setup for $125... my HPS was like $350 for the whole digital ballast, bulb, and reflector and base