Do not try to shine any lights on them I'm pretty sure they can see it. Also try feeding them a crushed mealworm for their larva that's what I did.
Also it does not look at all like they need hibernation, it looks like you gave them an energy pill.
Of course these ants can see lights. I shine lights on mine occasionally as well - what is the point of having ants if you can't look at them?
Formica do not like dried insects. A fresh cut-up mealworm on the other hand is generally well accepted.
Formica are a more active species. His were caught where they would naturally hibernate, so for the health of the colony and queen, it is wise to hibernate them.