Need help, plants in bad shape

Just got home from the weekend and 6 out of 9 of my plats are wilted completely. THey have been on a steady watering schedule with earth juice grow products. They are 4 and a half weeks. They are under a hortilux 400w metal halide conversion. The room gets plenty of ventilation. Just dont get it. I raised the light up and gave them some more water but I dont think thats it. Please help if you can.

plants at such a young stage dont really need any nutes yet, what are you using as your grow medium? pics would help

soil. ocean forest. there in a big rubbermaid tub with the light hanging from the ceiling. the room stays at about 80-85 degrees. I now have the light at about 4 feet above them. and Im mixing the nutes rather light. about a half a tbsp per gallon.

Sounds like a ventilation/heat problem. I had this same problem so I just put some fans on my plants and tried to keep the temp 75-80 degrees.