Lights Out is the sixth studio album by English rock band UFO, released in 1977. All songs are band originals except for "Alone Again Or" which is a cover of a song by the band Love. Reaching number 23 on the Billboard 200, it remains the band's highest-charting album in the United States. In the UK it hit number 54 and stayed on the chart for two weeks.
The album was UFO's first to feature lush string arrangements alongside more complex song structures than their previous albums. Producer Ron Nevison brought in Alan McMillan to handle the string and horn arrangements. The most notable song to feature the orchestral colouring was "Love to Love". It is also the first UFO album to feature Paul Raymond on keyboards and rhythm guitar.
In 1994, a CD comprising this album and No Heavy Petting was released by BGO Records. 2008 EMI's remastered edition includes four live bonus tracks recorded at The Roundhouse, London. The album cover erroneously states that these tracks were recorded in 1976, but the correct year is 1977. EMI did correct the writing credits, with Paul Raymond finally being credited for his contributions.