Help ! Nute burn?

I’d say nuts burn,if your under HPS but if led wellllllll my friend I’m new to them and it’s like starting all over. I can’t tell what the foook is what under LED

if youre getting some rusty spots, this could also be a calcium deficiency cal def starts with lower/old branches: the turn yellow in the next stage the yellow spots turn brown end stage: leaves will crack and die