Im new to this site and to indoor growing. I have pleanty experiance for outdoor growing but from my under standing indoor is a little trickier. My ? is i have built a 4x4x7 feet tall grow box i plan on doing a lst/scrog for the size of the space but how many plants can i grow under a 400 watt hps/mh in a 4x4 area without the buds being thin and airy? I have a 6 in inline fan w/ cabon filter for ventilation. Walls are lined with mylar? any tips are appreciated like i said im new to the whole indoor thing but not new to growing.