High heat and/or low humidity can also cause the sides to curl upward. I don't see much sign that the light was too intense, only some chlorosis, which could have another cause. Please post more details about your light.
My guess is nutrients are your problem. What do you feed them? NPK ratio?
They look like they've been watered recently. How often do you water?
Transplanting them to pots that breathe better probably would help.
Please post a picture of those dark spots using white light.
Thanks so much for the response!! I really appreciate it :) I have a 24 watt, blurple light (model # Z-DW-B21-GRSPL). Unfortunately I threw out the packaging
and I cant find a photo online so I don't know the proper recommended distance. It's been about 78-83 F in my room since I haven't installed my ac yet, been dying in my room...
The nutrients I used are Miracle Grow Plant Food (NPK 24-8-16, since I have learned better since it's long-release) and Pure Gold liquid fertilizer (1-1-1).
I water whenever the top of the soil (about an inch or so deep) is dried since the temp in my house upstairs is pretty varied so the soil dries out differently.
I'm just a regular gardener so I've been just using my knowledge from that, but grow lights are more picky than the sun.