Hi
@LumberjackBuds! Actually I think it's a combo: overwatering + high humidity + heat. I've experienced similar conditions in the past and also had this kind of leaf-curling. Also, I've seen you got some brand new QuantumBoards, be careful as they often came dimmed at 50%, but you need them dimmed around ~25% to avoid any light-stress for your babies. It seems that over-lighting is really a thing with QBs! So in this scenario I would reduce the light power, put a fan blowing around the pots to dry them quicker, maybe increase the light distance a bit, and see how it goes. Hope this helps, keep us up-to-date and happy growing 👊