Lumos Lumos is a weak
Light-Conjuring Charm. In French, you have
'allumer' for switching a light on, or lighting a match. When cast correctly, Lumos produces a small light at the end of one's wand. The more powerful the witch or wizard, the more powerful the light – normally, with age, Lumos is a basic spell of wandless magic, meaning that you needn't even hold your wand when casting it. The wand movement for Lumos is tracing the outlines of a
moon crescent in the air; the proper pronunciation is
Lumos.
The countercharm for Lumos is
Nox. This spell does not require any wand movement. Lumos is usually needed in dark, gloomy areas, to lighten your path and such. Also, against certain dangers, like the Devil's Snare who detests both light and warmth, it can help defend and escape.