thanks for all the replies. i have 4 cards and things are really going great. 25k + BTU AC unit is a must. got 16 in flower and 22 in veg. Going with 12 600w ajust a wings on dual digial ballasts. veg has 2 t5 bad boys (24 bulbs). EZ clone just got 29/30 rooted. Had a mite issue but went crazy on them and they are going. Neem oil works nice. Thanks again