Looking at the pictures, I can't really tell. However I think I see some cloudy and some just turning cloudy. Perhaps there is even a couple turning amber or perhaps it is the amber light. If you could get as close as possible and turn off the HPS maybe we could tell better. Try to get a profile of some triches with a dark background.

The entire trichome turns colors, but if you go too long the stem part turns extremely amber and withers to nothingness.