So thats a total of 15volts and thats not enough to keep your cabinet cool with the MH on. Now the Glass will help obsorb some of the heat. but your best bet would be to go to wal-mart and pic up 2 small fans for your out-take cause the 2 pc fans wont do much. Now using them to take out heat from you lamp is a good idea just give them a test run and make sure they dont melt if there plastic. Now for the passive intake method. It consist of a bigger/or more then one fan on the top and keeping 1/2 the size hole (PVC or a big enough plastic bottles rigged up on the bottom). for example if you have a 6 inch fan on the top youd want a 3inch PVC on the bottom with no fan. That will create a "NEGITIVE AIRFLOW" which will cause a breeze inside along with pulling in fresh air in/out. Now i will take some pics here in a few of my passive intake i rigged up. But i have to give props to my fellow members here whom helped me
camoxnhx Reviewed by camoxnhx on . grow room good enough?? hi i have quite a small grow box for 1 plant its height= 3ft 3" its depth= 1ft 4" and its width= 2ft 4". i a m using a cfl grow light its a huge thing (looks like a gatling gun) a 250w one and i am using 2 small fluoscent tubes, i have a 400w mh light and ballast but cant deal with the tempratures it raises.can i continue this way vegging or am i waisting my time without the mh light. anyone got ideas also on how i will be able to control temps with that size box?? here is a pic of how the Rating: 5