Is this mold or light burn?

I recently had a high humidity issue that I just fixed yesterday. Now I’m at a steady 50/55 RH whereas before, it would get up to 80. I also just bumped my lighting up to 75% about a week ago and will be putting it on full blast in another two weeks.

Could be wind burn, light burn, nute issue, and so on.

We don't know enough about your grow to give a straight answer.

If it doesn't rub off its not a fungus.

@Wizzlebiz i was thinking windburn too because my fans are a little close and direct to the plants... I just didn’t know what windburn looked like