Leafs curling ?

I didn't know where to post this question so I'll try on the general board. This
is my 2nd grow, the 1st one i killed by having the 400 watt mh light 5" above
the seedlings. This one is 1.5 weeks old and the plants are 1.5" tall, but the leaves are curling under, did i do some thing wrong?. The medium is fox farm
warrior with some perlite mixed in, don't give it and nutes, just PH'ed water, the light was 24" above the seeds, but now i droped it down to about 15". Attached are some pictures i took today. The one with the light was from the 1st grow, the rest are current. Need your help, don't want to wreck these white widows. Thanks

The light sounds good the way you've got it now. How much are you watering?
I wouldn't really worry, the leaves are a healthy green, they aren't stretching, and it's only the first set. But that's just my advice.

mine r curling up wuts up with that

I only have a few grows under my belt but it looks to me like its an over watering problem.

Seedlings are very hard to overwater- they can pretty much use 100% humidity when theyre that small. I dont think overwatering is the problem, but i'd wait it out and see what they do.