Leave issues

I agree with the others. Slight nutrient burn. Likely from feeding to often or not getting runoff. Best to use a EC/PPM pen to help determine the concentration. The pant will give you signs though like it is now. Don't know what LED Sickness is, but I don't see any issues from the lights in the attached pics.

Hi, I recommend giving your girls a flush with water under a shower or just by giving them plain water with adjusted ph for 3 to 5 days and see if you notice improvement it seems like little too much nitrogen was added but other than that good job on how far you got! At this stage it's very common that there's a salt buildup but it's a quick fix like I mentioned above if you need any more help feel free to send me a messege. If my anwser was helpful please like and happy growing!.

Nitrogen toxicity from feeding too often and probably a build up of nutrient salts in your substrate if you are not watering to run off each time you irrigate. If growing in soil, a schedule of plain water/plain water/fertilizer/plain water/plain water/fertilizer...........works well. Never feed every time you irrigate!

Even at half strength you have over baked her on nutes looks like p/k OD and not enough N, could be other issues.