Help Please! White widow leaves yellowing

Hey - hopefully can help me out - yellowing leaves, i suspect nute burn - which is being taken care of, or burn spots from spraying with the lights on (oops!), if someone could take a look at the pic and confirm one of my suspicions or suggest a new diagnosis that would be great!

Also a leaf on one of the plants is cracking, I attribute this to low humidity (20-30%), just got a humidifier so hopefully that will help.

How close are your lights? Looks like maybe you've had the lights too close, like right on the plant?

Vi

yea bro thats exactly what it looks like lol u musta had ur light less than half an inch away!!! back it up an inch and just keep doing what ur doing for a few more days than if it gets worse thats when u start thinking nute burn