^^Agreed. Anythings possible, , but how far ($$$) you're willing to go is another thing. Definitely need a cooltube, the water-cooled one sounds interesting to me. Maybe you can mount it so that it's not actually inside the rubbermaid, just mounted on top and shining through a hole cut to size.

Get a nice big fan (preferably with a speed controller) + cooltube and I'd say you have a shot. Worst thing that could happen is that you spend another $60 to build a real grow tent.
bigtopsfinn Reviewed by bigtopsfinn on . Heat/Cooling Issues Hi there. I am halfway through building a Rubbermaid Box. I was planning on using CFLs, however I have been given a 400w HPS bulb socket ant ballast. So Just how powerful of a fan should I be looking at purchasing, seeing as this bulb nearly melts the plastic without one? Or should I be looking at cool tubes? Cheers for the Help Rating: 5