Have you checked your runoff ph? I have never seen anything like this . Maybe iron deficiency according to this chart^
Hell yeah dude if you have water on your leaves and the lights are on its gonna crisp them. Misting anything besides new cut clones isn't really necessary. Move that light up too it sounds alittle close for how small your plant is, and 85 degrees is alittle to hot. You need mid 70s at the most no more than 81-82 degrees Sent from my iPhone using Grasscity Forum