Red Light

Red Light is the third studio album by South Korean girl group f(x), released on July 7, 2014, by SM Entertainment and Genie Music. It reached number one on the Gaon Album Chart and had two promotional singles, "Red Light" and "Milk". This is the last album with Sulli, who left the group one year after its release. Background Red Light has a dark and eerie concept, which f(x) said they liked. Krystal added that she liked this concept because she is often given roles that make her look pretty, and just this once she wanted something that would make her look darker and different. Naver describes the album's title track, "Red Light", as a "blast of urban rhythm bit, reversal in electro house genre". The lyrics talk about capturing great moments, stopping and reconsidering what is important in life. Also, it is a message, using a "red light" to symbolize the warning, that is expressed in an eye-catching way. Jakob Dorof of Vice described the song as "a high-tech whiplash thriller with a chorus that hits like a fist and, by the second blow, has you begging for it." Kenzie, wrote the lyrics and Maegan Cottone of Phrased Differently, Daniel Ullmann, Bryan Jarett, Allison Kaplan and Sherry St. Germain were credited with the song's music. It was produced by Lee Soo-man and Casper & B. f(x) member Amber Liu describes the song's dance as the "most passionate" and "most dynamic". Luna said that the song's genre fitted with their aim for a slightly intense but feminine image. The title track "Red Light" was played on Korean Broadcasting System's K-Pop Connection radio from July 8, 2014.