Lux Aeterna

Lux Aeterna, Latin for "eternal light", may refer to:

• Lux Aeterna (Communion), the Communion antiphon for the Roman Catholic Requiem Mass
• Lux Aeterna (Dave Fitzgerald album), a 1997 album by woodwind player Dave Fitzgerald
• Lux Aeterna (Terje Rypdal album), a 2002 album by guitarist Terje Rypdal
• Lux Aeterna (Ligeti), a 1966 choral work by Hungarian composer György Ligeti used in the film 2001: A Space Odyssey
• "Lux Aeterna" (song), the theme song to the film Requiem for a Dream, written by Clint Mansell and performed by the Kronos Quartet
• Lux Aeterna, a 1972 album by French classical composer William Sheller
• Lux Aeterna, a 1997 five-movement quasi-Requiem by Morten Lauridsen
• Lux Aeterna, a track from the 2009 album Calling All Dawns by Christopher Tin
• Lux Aeterna, a song from the 2014 album Miracles by Two Steps From Hell
• Lux Aeterna for 5 masked musicians, a 1971 avant-garde piece by American composer George Crumb
• Symphony N 5 Lux Aeterna, a 2006 avant-garde piece by Bulgarian composer Vassil Kazandjiev
• Lux Aeterna for organ, a 1974 work by Finnish composer Joonas Kokkonen
• A sanctuary lamp, commonly known as an eternal light