be on, be turned on
진짜 켜져 있네
It really is on.
— Space Sweepers (2021)
옆집도 불 켜져 있어
The lights are on next door too.
— 이키루 (1952)
안 켜져
It won't turn on.
— 알.이.씨 (2007)
서재에 불이 켜져 있다
The light is on in the study.
— 타인의 삶 (2006)