Doctor Light (Arthur Light) is a supervillain appearing in comic books published by DC Comics. He is the third individual to have adopted the persona of Doctor Light with the alias previously been used by a Golden Age foe of Doctor Mid-Nite and later Arthur's associate Jacob Finlay. Light, a long-time enemy of the Teen Titans and the Justice League, has been portrayed both as a serious menace and as a company in-joke for incompetent supervillains. His stint as Doctor Light is concurrent with that of a superheroine using the same name and nearly identical costume, Kimiyo Hoshi. In 2009, Doctor Light was ranked as IGN's 84th Greatest Comic Book Villain of All Time.