clone dying?

[wonare1one]

so i have 4 clones growin in my box and this one seems to be sick..... the ph reads lil below 7, i fed with water and big bloom 3 days ago, 2 floro 125 watt 3750 lumen bulbs, one exhaust and intake fans. i turn them off every other hour or so. the focus bites on my camera but the yellow colored leaves are curlin up! theres definate new growth since i put them in soil but only this one is giving me this problem any clues fellow growers? could it be to much light intensity for a 2'lx4'wx1.5'h box?

 

[trillions of atoms]

to much nutes, next time she needs water hit her with a hard watering and try to flush some of the ferts outta there. thattl fix her