None (spell produces light)
- "Harry took out his wand, murmured, "Lumos!" and a tiny light appeared at the end of it, just enough to let them watch the path for signs of spiders."
- —Harry using the spell.[src]
- Harry Potter used the charm twice in 1992, once on the way to the Acromantula's lair, and then again in the Chamber of Secrets.
- He used it again the following year, in order to see a dog, the one that had been following him, then later on the way to Honeydukes and then in the Hogwarts Grounds to see the Whomping Willow.
- Hermione Granger used the spell to illuminate the Woods Beside the Quidditch World Cup Campsites.
- Harry Potter and the Chamber of Secrets
- Harry Potter and the Prisoner of Azkaban
- Harry Potter and the Goblet of Fire
- Harry Potter and the Order of the Phoenix
- Harry Potter and the Half-Blood Prince
- Harry Potter and the Deathly Hallows