hi mc blaze, we actually have 14 plants under the lights. We've got 4 lowryders and 10 x skunk no 1. The lowryders have just been identified as 3 fems 1 male, male is now in another room, i dont wanna bin him lol. The area under the lights is 4'6" x 6'. Its completely surrounded by 4 walls of mylar, and mylar on the floor as well. Temp is approx 78, humidity 40-45%, PH at 5.5-6. Lights are on 18/6 cycle. I'd say the plants are 2'6" from the lights. They been repotted into 7.5 litre pots at weekend and seem to be doing ok. Fed on 1ml per litre of biobizz grow and 1ml per litre alg a mic, lowryders are also having biobizz bloom and topmax, same dosage, getting nice white hairs on them now mmmm lol