running 8 , 2ft t5s , vertical . 2 per wall .2 1/2 ft sq box 36" height. 2 @ 2700k 1 @ 3000k 2 @ 4100k 1 @6500k 1 @ 10000k .plus 2 2700k 200watt cfls hangin gives me 3/4 between nodes ,11 and 13 prong leaves dense buds and happy happy plants . planning to add 5000k and a uv red for triggering...