What’s causing this burnt tips?

[Lucasdesouza0151]

Hi I can’t seem to figure out why I have burnt tips my run off oh is 5.8 in coco could that be it my lights 2 foot away

 

[ArtfulCodger]

They look over-lit to me, based on the edge curl and slight taco-ing. What are your input and runoff PPMs/EC?

 

[TheCroppeteer]

I'm not sure about the tips, but the light or heat stress from the light seems like an issue to me at this stage. I'd raise it.