This is right on. Small cfls are the best value and allow you to position them in close to the foliage which is critical with cfls. I like 42watt.Get more lower powered CFLs rather than one big one. If you have several, you can spread the light out more, the heat wont be as bad, and if one burns out, youll have the rest of the lights to fall back on. You break one of those bigger ones and not only are you out a light, but that mo fo prob cost you about $30 or more.