Nut burn or heat stress?

[Mcnasty713]

So I was watering my auto flower plants and noticed these weird brown twisted tips at the tip of my leaves aswell as this weird outline on the veins, I’m using fox farm ocean and big buds (only used it twice) since the flowering started and using 2 1500 Led light (bloom mode) theyre 23” away from the plant need help differentiating can’t find answers on Google lol

 

[Bill.de.Cat]

Seems like it would be nutrient issues to me with the light being near 2 ft away....