Week 6 flower. New growth on bud pointy yellowish. Nute burn? Light or heat stress?

[DEVGRU_420]

Hey guys week 6 flower about to start week 7. I noticed on the top of a few buds this pointy new growth on the buds is yellowish lighter colored. Anyone know what causes this? Thanks dudes!
80 Degrees
60% rh
leaf surface temp 77
that cola is about 9-10 inches away from gavita 1650e
Feeding at 2.0ec 3 times a day. Using canna A and B. Also using Canna Calmag agent.

 

[mysticepipedon]

Those are leaf tips.

Is this on other leaf tips that are not on buds? If so, it might be nute burn. If not, your LEDs may be too close.