second link in my sig...

I have a 400w hps with a cooltube, tube fan and carbon filter, with both 10cm and 12.5cm tubing. You will see in my log that I changed the setup many times until I finally have it right this time. Temps are 26-28 C...

I actually have my thermometer sitting on top of the cooltube. If you have the proper reflectors for the top of the cooltube, it will stay nice and cool up there:thumbsup:
bigtopsfinn Reviewed by bigtopsfinn on . HID Lighting (Cool Tube) - A quick question Alright, I'd love to move from CFL to HID lighting. The only problem that's holding me back is the heat. I know HID lights put off some mad heat, but that's just from reading. I'm looking for someone with experience to give me some guidance. I've looked at some 400W MH/HPS (Switchable) Cool Tube setups, but they all have 6" fan hookups. Could I get away with a 6" to 4" adapter running to my 4" exaust fan? Or is the heat too much for my fan to move? (a pretty high CFM fan, sorry I can't Rating: 5