This is classic signs of heat stress , your leaves will start to curl upward making a "taco" like shape . You can correct this by doing a few different things , first things I would suggest is to raise your lights , because it looks like your light is to close to your plants . The second thing I would suggest if your at the maximum height your light can go is to get a better intake and exhaust fan to get the air circulating faster resulting in cooler temps .If you keep your plant in these conditions it will surely end up light burned so its best that you take care of it now so you can save your awesome plants. I would also advise that you exhaust out a window or somewere out of your grow area so you dont circulate the same hot air back into the tent this will help keep it much cooler in your grow enviroment (This is all information on how to treat the problem on inside growing ) now to do it on the outside part of things , your going to wanna keep your plant in somewere shaded , not were its shaded all day but were it gets some shade during the hottest parts of the day , so you could place it next to a tree or even build it a shadded area with screen that you would find in windows mounted on sticks to make a shaded canopy . You can get all the materials for that for less then 20$ at home depot or any of those kinds of places . The screen will provide shade and the suns penetration will still give your plant the light it needs this way you can get a cooler growing enviroment outdoors . I hope all this information helps you on your journey to becoming a grow master !! Happy Growing!