Bugs thend to be attracted to things like lamps and other bright sources of light in the dark. For us this might be a annoyence to have so many bugs attracted to your sources of light but in the cataclysm it could be rather dangerous if the bugs where the size of dogs.
It could be an interesting mechanic where having a non-conseled source of light in the darkness could attracte gaint insects. Meaning that things like sleeping next to a open lit campfire or using a flashlight in the dark could be much more dangerous and you might need to take measures to onseale a light source.