I don't know too much at this stage of my growing experiences, but it looks like the lower leaves are yellowed pretty badly when the upper leaves appear healthy - would such be the case if lighting were an issue? My experience with such yellowing lower leaves leads me to believe too many nutes is the cause. Stinky is one of the best I have seen, and I second her emotion.

Congratulations by the way on taking chances with the LED lights. Others have told you already, but with risk oftentimes comes reward - I am happy to see your risk led to reward, and I look forward to continuing to follow your LED grows!

Good luck in flushing your seedlings, and turning them around!