Usage patterns
〈場所〉に明かりをつけるto turn on a light (in a place)
I turned on the light in the room.
明かりが漏れるlight leaks or spills out (from a room, window, etc.)
Light was leaking out from the window.
明かりの下で〈動詞〉to do something under a light
I read a book under the light.
〈場所〉に明かりが見えるa light can be seen (in a place, e.g. in the distance)
I could see a light on in the house in the distance.
Expressions
明かりを消すturn off the light; put out the light
