Tent got up to 90 degrees could of been for 12 or so hours, light was pretty close as well 7 inches away I moved light 20 inches away from plants now , I watered yesterday with no nutes suggestions ??!
Isn't that a full spectrum light? Why are you taking pictures in the dark? lol Anyway, if it's light/heat stress, all you can do is wait it out, now that you fixed the problem. That leaf damage will get buried by new growth and you won't even notice it in a week or two.
To much nitrogen . Look up ........cannabis claw ......... I suggest just using plain water for the next couple waterings . It will straighten it out .