need advice

hows it going guys... so i decided to take my grow to the next level and move from my grow tent in my closet to my attic i cleared out a 4x6x8 space and put white sheets up to make my walls i would be using a 400w mh for veg and than switching to 400w hps and everything would be in 5 gallon soil now the question would be how many plants could i fit in that space comfy?

Get the ventilation, a/c, heat, exhaust, down right going into an antic... Go for it... Plants will also need training...

by the "book" a plant need 2.5 feet for proper growth - (LST) if one uses methods like SCROG ,Sea of Green, one can double the amount -but in those grows one would,use 3 gallon pots. with that size of grow space make sure your fans can exchange air every 45-60 seconds. - there is a formula to determine the amonut if CFM's need for your space - planst need fresh air - size and yields can be directly affected