Los Angeles, also known as the City of Angels, is where the series Lucifer takes place. Lucifer Morningstar moved there after abandoning his throne in Hell. In Los Angeles, he owns and runs the nightclub, Lux, while helping the LAPD to solve crimes.
Los Angeles is a actual heavily populated city in southern California. It is often known by the initials L.A. With nearly four million people in it, it's the largest city in California. It's famous for it's productions of Movies, Music, and Tv, like Lucifer.