I agree, superthrive or thrive alive. If they're not wilting or dying, then they'll pull through. Maybe a mild fertilizer too, but be very very careful as they can't handle much at this point unless you use a mild organic like worm castings.

After that amount of time, I almost ALWAYS move my clones and seedlings over to HPS lighting, but only to the side where they don't get as high of an intensity and move them in further over about 3 days to harden them to the strong light. That should do the trick.