I think Ill scrap the cooltube idea for the moment - I have to pay my parents £20 a month electric, and a fan is £80ish, then the tubing aswell, and then the cooltube on top of that... why pay all that cash to control the heat from the 600w, when at the moment I cant even utilise all the light it gives off? Im just gonna get either a 400w or a 250w.
Theyll work with a 600w ballast wont they, or will I need to buy a 400/250w ballast instead?