Make sure they're firmly seated in the medium. If they are "too firmly" seated, you may have bent or broken the stem and stopped water uptake.
Make sure that the lights aren't too bright, fluoros are all that's needed. Next time, an anti-transpirant spray will greatly reduce wilting-- they form a waxy barrier that keeps water inside the cutting.
The cuttings may be too large with too much leaf mass. You can trim off the half of the fan leaves to reduce area or take smaller cuttings. See the cloning article or aero-cloner instructions for photos of properly sized cuttings and a way to clone without wilt.
Also monitor closely the ambient air temperature as anything above 80 is starting to get too hot and this will serve to accelerate both transpiration and the drying out of your medium.
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