Hairs browning 2 weeks into flowering, no signs of hermie. Idea's?

So this is my first grow and it's been going great. 1 bag seed from some dank "Maui Wawi" that turned out to be a girl. CFL grow, 264 true watts 2700k bulbs, temps stay at 77F during the day and 65F-69F at night. FFOF soil and FF nutrient trio, Grow Big, Big Bloom, Tiger Bloom. Following the FF feeding schedule. 3qt pot in a tight space, LST. Journal in my sig.
Some of the hairs started browning on the lower sets of buds about a week ago, then over night last night about 50%-60% of the hairs started to brown. I've searched all over for herm parts and nothing, just hairs and buds. She did seem a little nitrogen deprived yesterday but I watered her for the first time with the full FF nutrient trio according to the FF feeding schedule and she is nice and green again. The buds also filled out quite a bit last night.
Anyways here are the pics, any help is greatly appreciated!

Those are some big buds for two weeks. I can't see very many brown hairs from the pics, she's looking top notch. Just count the weeks and focus on the trichomes, not the pistills.

Congrats man, your results are above the rest for a first time grow!!!

Yeah my camera isn't exactly ideal.. The reason I'm so worried is that I have never seen it happen before without some sort of deficiency or herm, maybe I just didn't look hard enough? maybe its genetics? Thanks DJ for the compliment and for boosting my confidence.
She was very mature when she went into flowering, I know this because she showed sex and her pistols within an hour after waking up from her first night of 12 hours sleep. Maybe this is why? I dunno...

So no worries then? anyone?

dont worry dude....could be the strain...ive had pistils brown in the 2nd or 3rd week of flowering, its no biggy dude. As the other poster above said...pay more attention the the trichomes, there the things that mash up your brain haha

those look great for 2 weeks, and browning in normal on the lower areas, not sure why maybe cuz theres less light there

lol right on rob, the buds are swelling every hour.. its a beautiful thing. It eases my mind knowing that someone else has had it happen with no problems so thanks man.
I've done tons of research and I have a 60x magnifier so I'll be waiting for 50% amber trichs.

Anyways everyone feel free to check out my journal/thread in my sig.
+rep to rob and DJ
Thanks again

EDIT: Thanks hellraizer! threw some rep your way as well.