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Originally Posted by Medijuana  TI have also now ran this with a 4" 160cfm exhaust fan and got 86.9F exiting the tube and 108.6F @ 8" below tube, that's a big difference between the two fans and will let me run the light much closer for better results. |
I think you could drop those temps much more...I run a 188CFM to pull the air through my 600W, I can get plants very close now, where before plants were burning within 14" of my old reflector and it was vented too. I used 10 feet of ducking so I could have the intake pulling in air from as low as possible, that little change helped alot......