Leaves curling inward on clones help please

Hiya
New room. Same temps. Lighting different...put in T5s (had T12s and BTW, the T5s felt more hot than my old flo's) and ALSO the new shelves are smaller. The babies are now about 6 inches from the lights.
1 mat (x 4 trays)
2 shoplights with T5s
Heat mat
Tray with Dome
Dome temp ave 74
Matt temp set at 80
Room ave temp 72
Just started having problems as soon as I moved into this new room.
My gut tells me the lights too close too hot since its mainly affecting the new growth.
Thank you so much.
PLEASE GIVE YOUR OPINIONS you guys are the best advice givers EVER

Looks like heat damage to me.....but normal "tacoing" is a cal/mag deficiency.

OK. If it was calmag def, could it have been caused by the mother having Nitrogen over load? I discovered my helper was feeding to much about 3 weeks ago. flushed the mothers at that time and they recovered. SO...with that being said, in your opinion, it could either be heat damage or over nutes in the moms?
Thanks for your prompt reply~!

could be heat stress , how for down the plant have the leafs curled . if most of the leafs all down the plant are curled its probs to do with another issue

looks like its in a bbq to me, all it will need is a little sauce , get it under control . pore clones, feeling sory for them