1st Grow, Tangerine dream Critical Purpl

Transplanted them into 4 by 4 rockwool cubes that soaked for 24 hrs. Placed in the tent with the LED light as they were also stretching for light with the T-5 I was using to propagate them, they got a little heat blasted as I have my tent set up in the garage and its start of arizona summer heat. have to invest in a light controller and an ac unit for the tent to help. have to vent it and have another fan on it for now and trying to keep up humidity as why i think they look a little sad have perked back up with adjusting to a watering cycle as im learning as my first grow. They have on a few a little burn spots im assuming its because of the lighting but have it up as far as it will go, in connection with the humidity not being high also. Any advice with be accepted also...running 15gal res with about 4 cycles of watering if to much let me know please...