Only nutes on the biggest one it started happening on all three of them when I transplanted into bigger pots, into jiffy organic seed starting mix. I did give all of them miracle grow nutes tonight diluted to less than 1/4 strength because I thought it was a defiency but it has only gotten worse
Did the leaves affected come into contact with water while your lights were on? Could it be light burn maybe?
Temps stay between 75 & 80 humidity around 35%. There was very little white mold on top of the soil before I transplanted, but I thought it was the beneficial mold because the organic soil. Last night I was freaking out and cut all the leaves off that had that on them. So far it hasn't spread anymore. I keep a box fan on them on high about 12 hours a day, and lights stay on 24/0.
