"Smart bat, flies in front of the light which then turns on. Sucks up the bugs and hangs out. Poops and is gone by morning."
Actually,, bats like to find a spot during the night to "rest & digest" after successful feeding. They find a spot with the right temperature & such,, land,, digest,, and leave their guano. Then they continue feeding. But they go to a daytime roost for longer time periods.