Because the light would attract bugs?
We have to deal with their droppings, and the pigeons also attract bugs, which at one point made their way into the apartment.
A few flowers attract pollinators by smelling like a corpse, which attracts bugs that are into laying their eggs on dead animals.
Fortunately, by understanding what attracts bugs to your home, you can begin making changes that will help get rid of them for good.
They attracted pollutants as a light attracts filthy bugs.
This removes edible components, such as sugars, that would otherwise attract rodents and bugs.
Something like plants releasing a poison / lure into the soil to attract bugs, but poisons them in the process.
The dim yellow security lights attracted bugs; small birds swooped out of the darkness.
Because the pileups attracted bugs and looked unsightly, some residents stopped recycling and were fined for breaking the law.
The more bloated the graphical user interface, the more likely the stickiness will attract bugs.