The Wand-Lighting Charm (Lumos) is a charm, a light-creation spell, used to illuminate the tip of the caster's wand; this light is fairly warm. The counter-charm for the spell is The Wand-Extinguishing Charm, (Nox) which is used to extinguish the light from the casters wand.

Despite its apparent simplicity, the Wand-Lighting Charm was not invented until the 18th century. It was first used publicly by Levina Monkstanley, its inventor, in the Ministry of Magic in 1772 — to the astonishment of her colleagues — to help her look for a fallen quillon a dusty corner.

However, Garvin Lugner, a German wizard, claimed to have been the one who invented the spell, while he was developing his Instant Darkness Powder. It later transpired that Lügner had been lying about the invention of the charm, and that his Instant Darkness Powder did not do too much more than slightly dim the lights.