What do you mean?
Near the end it's daytime and n is hiding in the corpse tower and he says that sunlight will kill him
It's theorized that this is a safety thing so that if the murder drones get out of control on earth then eventually it'll turn daytime and they can't come out and attack you
(Well.. !nk is half human, half leader of the Disassembly Drones, and so is Garet ((he's a skeletal murder drone)). They would be a MAIN part of the invasion)