Tmasmanswered grow question 2y ago I'm with Organoman and Roberts, nitrogen toxicity.
High stress caused by light, leaves curling up. In your case, it's curled down, excess nitrogen, give it a good watering with just pH-controlled water, and the next watering with 0 nitrogen, if possible. If you can't give 0 nitrogen, do the next 3 waterings with just water, then slowly resume the feeding routine.