i got 4x100 w cfl's putting out 1750 lm each...7,000,plus 1 x4 ft t8,putting out 5700 lm...seems to me thats 12,700,HOWEVER...i may be wrong,just reading what the manufacturers specs are....so i transplanted yesterday,first thing i learned ,1 seed per cup,at 4 inches,root bind is impossible to seperate,for me anyway,so i sacrificed 1 plant per cup,and i'm not sure of their survival,maybe i just wasted 3-4 weeks...anyway,should they hang on,i have another ballast light...T8..5700 lumins ...upping the total to 18,400,or 236 w...my calculations=100 w cfl=27w...x4=108w....+1 set ballast lights...t8..at 2850 lumin each...5700 lumin..at 64 w total......hmmm...172watts...i'm assuming this is correct,seems correct,......its been 12 hrs since t-planting....no drooping of leaves,so far...so i'm semi-optimistic,however,since this is my first grow,i would not be suprised at catastrophic failure,i'm in this to win this,so round 2 would be the next day....