Hopefully that'll help you figure out what's happening. :thumbsup:

Maybe the lights were just touching the leaves for a brief period, which possibly caused them to discolor, but not get crispy outright. Like I said, that almost seems too uniformly in a straight line to be a deficiency. But that's just me judging from appearance. Definitely give us an update when you and the hubby have a chance to get a good look at them. And definitely try to test that pH as soon as possible. That velvety look does sort of look like the early stages of Phosphorus deficiency, so don't rule anything out until you can test the pH.

Have a good evening. :jointsmile: