Blue Light or Blue light may refer to:

Science and technology

* Portion of the visible spectrum related to the

blue Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when ...

color **

Blue laser A blue laser is a laser that emits electromagnetic radiation with a wavelength between 360 and 480 nanometers, which the human eye sees as blue or violet. Blue beams are produced by helium-cadmium gas lasers at 441.6 nm, and argon-ion la ...

Blue LED A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corr ...

* Cherenkov radiation, the physical phenomenon responsible for the characteristic blue glow in nuclear reactors *

Blue light (pyrotechnic signal) Blue light is an archaic signal, the progenitor of modern pyrotechnic flares. Blue light consists of a loose, chemical composition burned in an open, hand-held hemispherical wooden cup, and so is more akin to the flashpan signals of the Admiral ...

, a firework composition used for night-time signaling and illumination *

Biological effects of high-energy visible light High-energy visible light (HEV light) is high-frequency, high-energy light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of biological effects, including those on the eye. HEV light may be a cause o ...

Military and emergency services

Blue Light (counter-terrorist subunit) Blue Light was an American counter-terrorist subunit of the 5th Special Forces Group that existed into the late 1970s. According to Col. Charles Beckwith's memoirs, this counter-terrorist group was formed by U.S. Army Special Forces leadership t ...

, a 1970s US counter-terrorist subunit of the 5th Special Forces Group * Blue lights, also known as

blues and twos Emergency vehicle equipment is used in the United Kingdom to indicate urgent journeys by an emergency service. This usage is colloquially known as "blues and twos", which refers to the blue lights and the two-tone siren once commonplace (althou ...

services, British emergency services * Blue lights,

emergency telephone An emergency telephone is a phone specifically provided for making calls to emergency services and is most often found in a place of special danger or where it is likely that there will be a need to make emergency calls. It is also sometimes kno ...

systems meant to deter crime, specially designed for use on campuses

Arts, entertainment and media

Film and television

* ''The Blue Light'' (1932 film), a 1932 film directed by Leni Riefenstahl * ''The Blue Light'' (2003 film), a 2003 Japanese film directed by Yukio Ninagawa * ''Blue Light'' (TV series), a 1966 television series starring Robert Goulet *

Blue Lights (2023 TV series) ''Blue Lights'' is a British police procedural television drama series set in the fictional Blackthorn police station in Belfast, Northern Ireland, where the series was filmed. Created and written by Declan Lawn and Adam Patterson, it began ...

, a British television series

Literature

* ''Blue Light'' (novel), 1998 novel by Walter Mosley * ''Blue Light'', an alternative title to '' The Transall Saga'', a novel by Gary Paulsen * "The Blue Light" (fairytale), a Brothers Grimm fairy tale

Music

Albums and EPs

* ''Blue Light'', an EP by

Aoife O'Donovan Aoife O'Donovan ( , ; born November 18, 1982) is an American singer and Grammy award-winning songwriter. She is best known as the lead singer for the string band Crooked Still and she also co-founded the Grammy Award-winning female folk trio I'm ...

released in 2010 * ''Blue Lights'' (album), an album by Kenny Burrell released as two volumes in 1958

Songs

* "Blue Light", a song by Armageddon Dildos from their 1997 album ''Speed'' * "Blue Light", a song by Bloc Party from their 2005 album ''

Silent Alarm ''Silent Alarm'' is the debut studio album by English rock band Bloc Party. Recorded in Copenhagen and London in mid-2004 with Paul Epworth as producer, it was released on 2 February 2005, by Wichita Recordings. The album peaked at number thre ...

'' * "Blue Light", a song by David Gilmour from his 1984 album '' About Face'' * "Blue Light", a song by Mazzy Star from their 1993 album ''

So Tonight That I Might See ''So Tonight That I Might See'' is the second studio album by American alternative rock band Mazzy Star, released on October 5, 1993. The album's first track, "Fade into You", became the band's first and only single to make the ''Billboard'' Ho ...

'' * "Blue Light", a song by Miranda Sex Garden from their 1992 EP ''

Iris Iris most often refers to: *Iris (anatomy), part of the eye *Iris (mythology), a Greek goddess * ''Iris'' (plant), a genus of flowering plants * Iris (color), an ambiguous color term Iris or IRIS may also refer to: Arts and media Fictional ent ...

'' * "Blue Light", a song by Mitski from her 2018 album ''

Be the Cowboy ''Be the Cowboy'' is the fifth studio album by Japanese-American indie rock musician Mitski, released on August 17, 2018, through Dead Oceans. Produced by longtime collaborator Patrick Hyland, the album widens Mitski's palette with a return to the ...

'' * "Blue Light", a song by Mostly Autumn from their 2006 album '' Heart Full of Sky'' * "Blue Light", a song by Prince from the ''

Love Symbol Album ''Love Symbol'' is the fourteenth studio album by American recording artist Prince, and the second of two that featured his backing band the New Power Generation. It was released on October 13, 1992, by Paisley Park Records and Warner Bros. Rec ...

'' * "Blue Light", a song from '' Braggin' in Brass: The Immortal 1938 Year'' * "Blue Lights" (song), a song by Jorja Smith from her 2018 album ''Lost & Found'' * "The Blue Light", a song by Frank Zappa from his 1981 album ''

Tinsel Town Rebellion ''Tinsel Town Rebellion'' is a double live album released by Frank Zappa in May 1981. The album was conceived by Zappa after he scrapped the planned albums ''Warts and All'' and ''Crush All Boxes'', and contains tracks that were intended for thos ...

Other uses

Blue Light (horse) Blue Light (foaled 1958 in Ontario) was a Canadian Thoroughbred racehorse. Background Blue Light was a bay horse bred in Ontario by E. P. Taylor. He was sired by Canadian Horse Racing Hall of Fame inductee, Chop Chop. His dam, Blen Lark, was a ...

(born 1958), Canadian racehorse * Blue Light, a Canadian beer made by the

Labatt Brewing Company Labatt Brewing Company Limited (french: La Brasserie Labatt Limitée) is a Belgian-owned brewery headquartered in Toronto, Ontario, Canada. Founded in 1847, Labatt is the largest brewer in Canada. In 1995, it was purchased by Belgian brewer ...

* Blue Light Specials, sales held at

Kmart Kmart Corporation ( , doing business as Kmart and stylized as kmart) is an American retail company that owns a chain of big box department stores. The company is headquartered in Hoffman Estates, Illinois, United States. The company was inco ...

stores * Bluelight (web forum), a web forum dedicated to discussing controlled drugs