During the 1993–1994 school year, Charity Burbage, who replaced a wizard as professor of Muggle Studies, placed a Lumos Duo spellbook in the Muggle Studies Classroom. Ronald Weasley later found it and took it, learning the spell for himself and using it against several Hinkypunks and the ghoul which was harassing Neville Longbottom.
Behind the scenes
- It can only be learned by Ron Weasley in the video game adaptation of Harry Potter and the Prisoner of Azkaban, and does not appear in any of the books or films.
Derived from two words; the Latin lumen, meaning "light," and the Latin duo, meaning "two".