What do you think about this?
https://en.m.wikipedia.org/wik... in my grow room, 90% of the fungus gnats are found here on my cold windowsill, why?

They are alive, when I blow on them they all move in a synchronized manner, bizzare

Check this out. They are a select few species that can actually WITHSTAND frosted winters, amazing, do you think that the grow room is constantly warm, is fooling them and they are trying to enter w state of diapause on the windowsill?

Only a select few are on my actual plants.

I think it is more likely that they are attracted to the light. Do they stay there at night?

Yea, I have my grow lights in at night, so we can rule that out, and there on the bottom, not all over trying to reach the sun or anything