Lee Yujeong (LIGHTSUM) Profile and Facts Yujeong is a member of the South Korean girl group LIGHTSUM. She was a contestant in the survival show Produce 48. Stage Name: Yujeong (유정) Birth Name: Lee Yoo Jung (이유정) Birthday: June 14, 2004 Zodiac Sign: Gemini Chinese Zodiac Sign: Monkey Height: 162 cm (5’3″) Weight: 41 kg (90 lbs) … Continue reading Yujeong (LIGHTSUM) Profile and Facts