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Here's the problem with your question, it was answered in detail in a thread just yesterday. All of this information is here on this forum - but YOU need to put the effort into researching it. There are a lot of friendly, helpful people on this forum, but you can't bypass the research step.

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PharmaCan Reviewed by PharmaCan on . First closet grow, in need of tips! Alright, so my set up is a 400 watt MH over 5 plants in a closet 3 1/2ft. x 2ft. Everything seems to be going fine except ventilation. I'm at about 85 degrees F and 40% humidity. I have a tall skinny 3 foot fan blowing out the crack of the door. This had brought my temps down from 90 degrees F. I Also have a 6in. fan blowing towards the gap in between the plants and the light. I have read and been researching many forums and posts about this same sort of situation. I am just curious as to what Rating: 5