"When I know Lumos, I can chase away the bogeyman at night, or at least make him squint painfully."
—Hufflepuff student.[src]

The bogeyman is a creature that preys on young children. Bogeymen are vulnerable to light, so a simple Wand-Lighting Charm is enough to make them "squint painfully".[1]

It's possible these creatures are imaginary or related to Boggarts in some way.

It may also be possible that the Bogeyman doesn't exist, and the student was imagining it, or that it is simply another name for a Boggart.


Notes and references