I have 7 girls growing in a 3X5 closet. I'm using a 400W hps for light...but I still think I over did it by 1. It really is a bit crowded. I am about 30 days into 12/12 with some nice results on all the girls. I am just wondering if I should maybe pull 1 early to give the others more room...maybe get better results from the others.