thanks sheesh, ive got a lumii dimmable ballast, with a adjustawing avenger reflector, and a phillips greenpower lamp, all which as far as i know is one of the best hps light set ups in the uk, thanks for telling me about your friend (12 oz in soil) as its quite a larger yield in DWC,,, one thing thats not very clear to me is,am i supposed to have circular fans below the screen, or above or both???,, and should the lights off radiators be below the screen or above???