“불을 켜다” (bul-eul kyeo-da) to mean “to switch on the light.”
Example Sentences:
방이 어두워서 불을 켰어요. (bang-i eo-du-wo-seo bul-eul kyeoss-eo-yo.) – I turned on the light because the room was dark.
불 좀 켜 주세요. (bul jom kye ju-se-yo.) – Please turn on the light.
불을 켜고 책을 읽었어요. (bul-eul kye-go chaek-eul ilg-eoss-eo-yo.) – I turned on the light and read a book.
불을 켜도 아직 어두워요. (bul-eul kye-do a-jik eo-du-wo-yo.) – Even after turning on the light, it’s still dark.
방이 어두우니까 불을 켜 주세요. (bang-i eo-du-u-ni-kka bul-eul kyeo ju-se-yo.) – The room is dark, so please turn on the light.
See also 불을 끄다