Nox

Nox,
____Pronunciation: /ˈnɒks/ NOKS
____Description: Counter charm to the *Lumos spell.
____Suggested etymology: Correct classical Latin nox meaning "night”

*Lumos,
____Pronunciation: /ˈljuːmɒs/ LEW-mos
____Description: Creates a narrow beam of light that shines from the
____wand's tip, like a torch.
____Suggested etymology: Latin lumen meaning "light"

Big thank you to polly for beta-reading this for me.

Lumos.
It's electric when they meet, and for the years they remain friends. But things change.
Nox.