LIGHTSUM

Concept photo for Honey or Spice

**LIGHTSUM** (Hangul: 라잇썸; Katana: ライトサム) is a six-member girl group under Cube Entertainment. The group consists of the members Yoon Sangah, Han Chowon, Kim Nayoung, Nagai Hina, Lee Juhyeon and Lee Yujeong.

Originally as eight, the group was reorganised without Oh Huiyeon and Kim Jian on October 25, 2022. 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."

## History

### Pre-debut

    On April 15, 2021, a video posted on the group's social medias revealed their name and logo. 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.

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

### 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. 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)."

    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". 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*.

LIGHTSUM won the "Female Rookie Idol Award" at the 2022 Korea First Brand Award held on December 26.

### 2022: *Into The Light*, Huiyeon and Jian's departure

     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. Two days later, a teaser announced that the group's first mini album, *Into The Light*, will be released on May 24. On this day, the mini album, along with its title track "ALIVE", were released.

On October 25, 2022 Cube Entertainment announced that Huiyeon and Jian left LIGHTSUM and the group will continue promoting with six members going forward.

LIGHTSUM won the "Potential Award" in the category "Music" at the 2022 Asia Artist Awards held in the Nippon Gaishi Hall in Nagoya, Japan on December 13.

## Members

### Mini albums

* *Into The Light* (2022)
* *Honey or Spice* (2023)

### Single albums

* "Vanilla" (2021)
* "Light a Wish" (2021)

### OSTs

* "Dance Dance" (Bella's Dream OST Part.1) (2021)

### Web shows

* *LIGHTSUM: SUMDAY* (Youtube, 2021-present)
* *LIGHTSUM: SUMthing* (Youtube, 2021-present)
* *SUMtime High School* (Youtube, 2021-2022)
* *LIGHTSUM Marble* (Youtube, 2022)
* *LIGHTSUM: SUMfactory* (Youtube, 2022-2023)
* *LIGHTSUM: Light-Log* (Youtube, 2023-present)
* *SUMtime University* (Youtube, 2023)

## Concerts

### Concert participation

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

## Fan meetings

* *LIGHTSUM Official Fan Club SUMIT 1st Fan Meeting [The Best Birthday Ever!]* (2023)

## References

1. ↑ 1.0 1.1  LIGHTSUM on Twitter: Announcement on LIGHTSUM's future promotions
2. ↑ 2.0 2.1 Naver News (Korean): 큐브, 새 걸그룹 '라잇썸' 론칭 예고…(여자)아이들 이후 3년만
3. ↑ @CUBE\_LIGHTSUM on Twitter - Official Logo Animation (April 15, 2021)
4. ↑ LIGHTSUM on Twitter: SANGAH (April 19, 2021)
5. ↑ LIGHTSUM on Twitter: JUHYEON (April 19, 2021)
6. ↑ @CUBE\_LIGHTSUM on Twitter: CHOWON (April 20, 2021)
7. ↑ @CUBE\_LIGHTSUM on Twitter: JIAN (April 20, 2021)
8. ↑ @CUBE\_LIGHTSUM on Twitter: NAYOUNG (April 21, 2021)
9. ↑ @CUBE\_LIGHTSUM on Twitter: HUIYEON (April 21, 2021)
10. ↑ @CUBE\_LIGHTSUM on Twitter: HINA (April 22, 2021)
11. ↑ @CUBE\_LIGHTSUM on Twitter: YUJEONG (April 22, 2021)
12. ↑ @CUBE\_LIGHTSUM on Twitter (April 22, 2021)
13. ↑ @CUBE\_LIGHTSUM on Twitter (May 26, 2021)
14. ↑ @CUBE\_LIGHTSUM on Twitter (September 17, 2021)
15. ↑ @CUBE\_LIGHTSUM on Twitter (September 23, 2021)
16. ↑ 16.0 16.1 Naver News: 고객만족 향한 노력 빛나는 기업 만든다
17. ↑ Soompi: LIGHTSUM Hints At Potential Comeback With Bright And Intriguing Teaser
18. ↑ @CUBE\_LIGHTSUM on Twitter (May 8, 2022)
19. ↑ 19.0 19.1 Soompi: Winners Of 2022 Asia Artist Awards
20. ↑ *Do You LIGHTSUM?* (Episode 3)
21. ↑ UNI-KON 2022 Line-up. *UNIVERSE Twitter* (2022-06-23). Retrieved on June 26, 2022.

## Official Links

**Korean**

* Facebook
* Instagram
* Twitter
* V Live
* YouTube

**Japanese**

* Twitter

**Chinese**

* Weibo