like for real wtf is this?????

ok so these are some little girls. little over a month old in some soil under some cfls and now im starting to see these spots that are starting to spot and turn brown. some at the base of the leaves and stuff
does anyone know what this is?

first pic looks like you slopped something on the leaves (nutes or ph down, or something else we use in a room) and it burnt the leaf.
second pic is a leaf roll..several causes. Rh, temp, underwatering, and most commonly.. over fertilization. You can check to see what is out of whack, and narrow down the culprit.
third looks like it's a little warm in there, and again, a spill that burned the leaf. doesn't look like bug damage to me.
4th.. you got me. The light is throwing me off... looks like it's getting red? could be a P difficiency...or is it brownish? and could be a fungus? I've never seen anything exactly like it personally though, so I'm not 100% sure...sorry man...

i have had a similar problem that has gotten better( but still there) i had the same brown spots and edges curling up, but idk what helped it. i upped rh to mid 40s to mid 50s by adding a humidifier that seemed to help but the problems still there. ive also upped nutes, dropped temp to 60s F, and ive played w watering up and down with no real appaernt difference. im still not sure whats causing it but rh seemed to help. hope somebody knows whats up