LIGHTSUM (Hangul: 라잇썸; Katana: ライトサム) is an eight-member girl group under Cube Entertainment. They made their debut on June 10, 2021 with their first single album "Vanilla".

Name Meaning

Cube Entertainment described the group's name as meaning "bright LIGHTs will come together as one SUM in order to reach everyone across the world, becoming a group that will convey positive energy to everyone through their hopeful message."[1]



On April 15, 2021, a video posted on the group's social medias revealed their name and logo.[2] Later in the day, it was revealed that LIGHTSUM is set to debut in the first half of 2021, after Cube Entertainment decided to accelerate the group's debut preparations.[1]

On April 19, 2021, Sangah and Juhyeon were revealed as the group's first and second members respectively.[3][4] The next day, Chowon and Jian were reveal as the third and fourth members, respectively.[5][6] On April 20, Nayoung and Huiyeon were revealed as the fifth and sixth members respectively.[7][8] On April 21, Hina and Yujeong were revealed as the seventh and eighth members respectively.[9][10] Finally, on April 22, the group's profile photo was released.[11]

2021: Debut with "Vanilla", fandom name, first comeback with "Light a Wish"

On May 26, 2021, a teaser image posted on the group's socials medias announced their debut single album, titled "Vanilla", would be released on June 10.[12] On this day, the single album and its title track of the same name were released.

On September 17, LIGHTSUM announced their official fandom name to be "SUMIT". The name means "LIGHTSUM and their fans become one through the medium (it) of LIGHTSUM (sum)."[13]

On September 23, a teaser posted via the group's social medias announced they will make their first ever comeback on October 13 with the single album "Light a Wish".[14] On this day, the single album, along with its title track "VIVACE", were released.

On December 18, the group released their first OST single, titled "Dance Dance", for the animated children's show Bella's Dream.

2022: Into The Light

On May 6, 2022, LIGHTSUM posted three teasers across their social media accounts that hinted at a potential comeback - their first in over 7 months.[15] Two days later, a teaser announced that the group's first mini album, Into The Light, will be released on May 24.[16] On this day, the mini album, along with its title track "ALIVE", were released.


Name Stage name Date of Birth Position(s)
Yoon Sang-ah (윤상아) Sangah (상아) September 4, 2002 Lead Dancer, Rapper
Han Cho-won (한초원) Chowon (초원) September 16, 2002 Main Vocalist
Kim Na-young (김나영) Nayoung (나영) November 30, 2002 Main Vocalist, Lead Dancer, Center[17]
Nagai Hina (ナガイ ヒナ) Hina (히나) April 7, 2003 Sub Vocalist
Lee Ju-hyeon (이주현) Juhyeon (주현) April 8, 2004 Leader, Main Dancer, Lead Vocalist
Lee Yu-jeong (이유정) Yujeong (유정) June 14, 2004 Sub Vocalist
Oh Hui-yeon (오휘연) Huiyeon (휘연) August 1, 2005 Sub Vocalist
Kim Ji-an (김지안) Jian (지안) November 6, 2006 Rapper, Sub Vocalist, Maknae


Mini albums

Single albums



Television shows

  • Do You LIGHTSUM? (Mnet, 2021)

Web shows


Concert participation

  • Donauinselfest 2022 (June 25, 2022)
  • 2022 UNI-KON[18] (July 3, 2022)
  • KCON 2022 LA (August 20, 2022)
  • KCON 2022 US Tour (August 21 - August 31, 2022)

Awards and nominations

Award ceremony Year Category Nominee/Work Result
Asia Artist Awards 2021 Female Idol Group Popularity Award LIGHTSUM nominated
Asian Pop Music Awards Best New Artist (Overseas) LIGHTSUM / Light A Wish
Mnet Asian Music Awards Artist of the Year LIGHTSUM
Best New Female Artist
Korea First Brand Award 2022 Female Rookie Idol Award won[19]
Seoul Music Awards K-Wave Popularity Award nominated
Popularity Award
Rookie of the Year


Official Links