noun
bright place; the light
Refers to a well-lit area or being in the light, often contrasted with darkness.
明るみに出て写真を撮ろう。
Let's go out into the light and take a picture.
noun
the open; light of day; public knowledge
Used almost exclusively in the phrase 明るみに出る, meaning something hidden becomes publicly known or exposed.
See also: 明るみに出る
不正が明るみに出た。
The misconduct came to light.