i just finished lightproofing my closet. my dimension are 2 1/2 by2 1/4 by6 1/2.not the biggest space but dats all i have.im stuck deciding whatweould be the best way to ventilate this space?what size fans should i buy. wat number of cfm's would do justice to a space this big! {lol)im aware that i need two .one ontake and one out,wati dont know is wat size would do the job,without comprimising the grow,by the way i have a 400 watter.hps and mh.and ill be growing a total of six plants or four wich ever one is the best choice...still doing my homework on dat subject.feel free yo add any info you might have on ...............