Potassium or light burn ?

[Mañ'O'Green]

That is a PH problem if the numbers above are correct and you mixed your nutrients properly. I don't know how many times I have to say it LEDs do not burn plants - PERIOD. The fact that they can speed up the intake of nutrients can cause a nutrient burn. The lights do not burn a plants. I have had 2500 PPFD on plants 3 inches from the lights without getting burned.

 

[Imagine]

That is a PH problem if the numbers above are correct and you mixed your nutrients properly. I don't know how many times I have to say it LEDs do not burn plants - PERIOD. The fact that they can speed up the intake of nutrients can cause a nutrient burn. The lights do not burn a plants. I have had 2500 PPFD on plants 3 inches from the lights without getting burned.

Thanks MoG. I guess maybe I was referring to a light induced nute burn rather than a temperature type burn. My bad. I just see damage occurring on the very highest parts of the plant and drew the conclusion that it might have something to do with the lights. I'm open to any and all guidance and glad to have it.

 

[Simplicio]

This is semantics.
If lights too close causes problems, that is light burn by definition.

I use LEDs that are too powerful, and get burn it they aren't dimmed.
Light photons carry energy.
Too much energy burns.