Light always dispels…
… exposes the darkness.
In the Gospel of John, Jesus uses a lot descriptive language and associates God with light as “In him was life, and that life was the light of all mankind” (John 1:4) and “While I am in the world, I am the light of the world” (John 9:5).
And He most certainly was.
Jesus wants us to “Believe in the light while you have the light, so that you may become children of light” (John 12:36).
Even in the creation account, the light and dark had to be separated (Gen 1:4) and it took an act of God to do it.
The light shines in the darkness, and the darkness has not overcome it. (John 1:5)
I have come into the world as a light, so that no one who believes in me should stay in darkness. (John 12:46)