Is this LED light burn?

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I would remove the w
I would remove the worst yellow leaves and flush with ph water and give it some flower nutes along with some cal/mag and micro nutes.This might help get her through flowering but she is in rough shape so hope for the best.


What he said.

I would add that a good foliar spray can help a lot. It looks like you have multiple problems. Some of those pic angles do look like scalding. I think you have given her a hell of a pH related shock. I see conflicting symptoms. Red in the petioles is Cal/Mag def, younger/top leaves yellowing is an immobile nutrient issue like zinc or iron. If the yellowing started in the older/lower leaves it is N def. But with the wild pH fluctuations, it is most likely a lock out. With the lights so close, she is drying out and will likely need a early harvest.
 
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