Red light may refer to:
Science and technology
- Red, any of a number of similar colors evoked by light in the wavelength range of 630–740 nm
- Red light, a traffic light color signifying stop
- Red light, a color of safelight used in photographic darkrooms
Arts and entertainment
- Red Lights (novel) (Feux Rouges), a 1953 book by Georges Simenon
Film
- Red Lights (1923 film), a 1923 American silent film
- Red Light (film), a 1949 crime film starring George Raft
- Red Lights (2004 film) (Feux rouges), a French thriller directed by Cédric Kahn
- Red Lights (2012 film), a thriller by Rodrigo Cortés
- Redlight (film), a 2009 documentary film
Music
- Red Light, a sublabel of Tunnel Records
- Redlight (musician) (born 1980), British electronic musician
Albums
- Red Light (Bladee album), 2018
- Red Light (f(x) album), 2014
- Redlight (Grails album), 2004
- Redlight (The Slackers album), 1997
Songs
- "Red Light" (Linda Clifford song), on the soundtrack to the film Fame
- "Red Light" (David Nail song), by David Nail
- "Redlight" (song), a single by Ian Carey
- "Red Light" (U2 song), by U2
- "Red Light", a single by Eddie Murphy, featuring Snoop Dogg
- "Red Light (Siouxsie and the Banshees song)", by Siouxsie and the Banshees from Kaleidoscope
- "Red Light", by The Strokes from First Impressions of Earth
- "Red Light", by Fastball from Keep Your Wig On
- “Red Light”, by Jonny Lang from Long Time Coming
- "Redlight", by Kelly Osbourne from Sleeping in the Nothing
- "Red Lights" (song), a single by Tiësto
- "Red Lights", by duo Chloe x Halle from their EP Sugar Symphony
Other uses
- Redlight Children Campaign, an American non-profit organization
- André Racicot (born 1969), nicknamed "Red Light", retired ice hockey goalie
- Operation Red Light II, a 2006 coalition military operation of the Iraq War
See also
- Red-light district, a part of an urban area where there is a concentration of prostitution and sex-oriented businesses
- Red Light Lizzie (fl. 1860–1875), a 19th-century madam and underworld figure in New York City
- Red light/Green light, a traditional children's game
- Red Lantern (disambiguation)