I think a little less water will do some good. The leaves wilting is a sign that the plant has been overwatered. Maybe also look at getting reflectors for the lights, your plants aren't using half the light those bulbs put out without the reflector bouncing it back down and that foil on the box top isn't doing much good that far away. Fluoros don't have much light penetration, the closer the better. Move your plants to around 2" from the bulbs and have a fan blowing across the soil under the lights to help keep temps down at the bulb, strengthen the stems, and dry the soil out a bit more to help with the overwatering.

Good luck and have fun!