Arclight, Arc Light or arc light may refer to:
- arc lamp, a type of electrical lighting apparatus
- Arc Light (novel), a 1994 techno-thriller novel by Eric Harry about an accidental nuclear war between the United States and Russia
- Arc Light Controversy of 1916 in what is now the Virginia-Highland neighborhood of Atlanta
- Operation Arc Light, the 1965 deployment of B-52 Stratofortress bombers to Guam
- Arclight (comics), a mutant super-villain character from Marvel Comics
- Arclight (DC Comics), a super-villain character from DC Comics
- ArcLight Hollywood, a cinema complex in Hollywood, California
- ArcLight (missile), a development program of the Defense Advanced Research Projects Agency to develop a replacement for the Tomahawk missile
- ArcLight Sherman Oaks, a cinema complex in Sherman Oaks, California
- Arclight Theatre, an off-Broadway theater in New York, New York
- Arc Light (album), a 2009 album by Lau
- Arclight, the third album by Swedish rock band Silverbullit
- "Arclight", a song by VNV Nation, from the album Empires
- "Arclight", a song by Deathstars, from the album Night Electric Night