Plants Wilting Down?

its been about 2.5 weeks and i opened my door to look at my plants and noticed they were wilting down, is this normal for the plant to wilt during the night cycle and straighten back up after in the light for a while

I have some starins that wilt slightly whereas others sit up and beg all the time.....just keep an eye on them....is this 2.5 weeks into veggin?

yeah they are vegging, they are just reg seeds from a sac. I don't know if that has anything to do with it

Is it all of the plant that's wilting or mostly the new growth?

I run multiple strains in my perpetual grow, some strains do wilt a little when the lights are off.

Check it a couple hours after your lights turn on, if they are still wilted its time to investigate.
IS the soil dry? Are the temps too high?