Ive currently got six plants in a 5x4 (x6ft tall) under a 400 watt HPS. 2 heavy duty fruity, 2 grand daddy purp, 1 purp kush, 1 pink lady. HDFs are 1.5ft tall, GDP 14-15 inches, purp kush 1ft, pink lady 8.5 inches. Started flowering 3 days ago, showing pistils already after 36 hour dark...