This just natural browning?

So are these brown hairs just natural browning? they seem to be coming a bit early, seeing as i just started week 6. is this just some early brown? or is it possible nute burn (i used a bit of nutes recently, not a stong dose, but these girls are sensitive). my colas have no where near as many of these, and they only seem to be turning to red this quickly on the bottom buds of the plant, none of the upper have more than a couple. if this isnt clear enough i can take a few more shots. any thoughts?

I think they turn that color early if your light schedule is inconsistent. Not positive though.

hmm, its been a solid 12 hours (my timer is a bit inaccurate so it may vary by upwards of 5 minutes of light) but its never over 12 of light and there are no light leaks to speak of. oh, and its only on the one (of 3) this plant has always been a little different than the other two (slightly more sensitive to nutes, far bushier) even though they are the same pheno. light conditions, temps everything have been the same between the 3. thanks though, i will be looking into this as a possibility... anyone else?

pready natural, your lower buds will beign to get brown hairs before top ones
at week 6, all is normal

excellent just glad that isnt a sign of nutes burning the buds. thanks for the input!