i aready have a shitload of cfl's the problem is yes they do not emit as much heat as a HPS bulb but the problem is when you have 8-10 of them emmiting almost 300w the combined heat of all the lamps and attached ballasts creates a problem too....i think one hps bulb at the top would be better than 8 - 10 surrounding my plants with heat. Also im just growing for myself so i really dont need alot, i will never sell any of my yield...only gifts to one VERY close friend. i think 250 watts in a 6 ft cab would be perfect for me I just need to find the right cabinet and start collecting an array of hydro gadgets over time....I almost enjoy the growing as a hobbie as much as the smoking...wait not really but i have realized i love growing and just wanna get a stealthy cab put together over time.....the cab I have now is really just to get started with but when i get a six footer I wanna still use he 250 with a cool tube setup.....two site DWC bucket and a cloning, propogation shelf on top with my cfl's....thats the long term plan!