'Light' in the Bible

Woe to them that devise iniquity, and work evil upon their beds! when the morning is light, they practise it, because it is in the power of their hand.

Rejoice not against me, O mine enemy: when I fall, I shall arise; when I sit in darkness, the LORD shall be a light unto me.

I will bear the indignation of the LORD, because I have sinned against him, until he plead my cause, and execute judgment for me: he will bring me forth to the light, and I shall behold his righteousness.