Top 5" of colas of one plant lightening.

So I have one plant in my tent that I think I'm seeing early signs of deficiency on. I have 8 plants all running on this same soil mix and this is only one showing any sort of issue.

The only thing I can think is that this plant is pretty well right beside my AC blower and it was basically blasting this spot with cold air. I was out of town for a few days and wasnt able to adjust it and we had a couple cold days and my temps plummeted in my room for a few days. Chlorophyll issue caused by cold?

Running a slightly modified Coots mix,
ground Barley/Rye top dressing.
probiotics
WCT
480 W quantum board @ ~14" from Canopy

Aside from my getting too cold theory, any other ideas out there? I'd just like to get ahead of a nutrient issue before it turns into a big deal.

Thanks guys!

Try backing the light off a bit.

I didn’t really feel it was too close (this plant is back right).

Have to raise it because the original Skunk won’t stop stretching though so we will see

It's your lights for sure, supercrop anything that's getting two tall or raise lights or dim them. That's your options

Yeah man you’re burning the buds. Super crop that shit if you can’t raise the lights up any more.