Doesn't look like light bleaching to me. Bleaching starts at the center of the leaf and works out toward the edges. The whole leaf will yellow, including the veins. In veg you should be good with your light about 18 - 20" above the plant. Raise or lower it to keep your node spacing, the space between leaf sets, at 1". In flowering, lower it to 12 - 14". No need to add any CFLs unless for supplemental lighting. Your LED should provide the correct light spectrums for good growth both in veg and in flowering.
Looks soil related to me, most likely the pH is off causing a nutrient lockout situation.