How to tell if this is light burn?

[humanbian]

Or something else? I don’t think I see any pests, but what do you all think?

Running under LEDs for about 15 hours, about 72-75 degrees F, humidity 50-90% depending on how often I mist.




Sent from my iPhone using Tapatalk

[Grey Moss]

Does not seem to be burn to me. Badly sunburnt leaves turn red and then dry out, turning wrinkly and brown. That seems to be a patch of dead tissue. It's not an issue now but keep an eye on it to see if it spreads beyond that leaf.

[humanbian]

Thanks Grey Moss! I had noticed it initially spread from about half that but it seems to have stabilized. Why does that happen? Is it sometimes symptomatic of a larger issue?


Sent from my iPhone using Tapatalk