'Light' in the Bible

Ho, ye who are desiring the day of Jehovah, Why is this to you -- the day of Jehovah? It is darkness, and not light,

Is not the day of Jehovah darkness and not light, Even thick darkness that hath no brightness?

And it hath come to pass in that day, An affirmation of the Lord Jehovah, I have caused the sun to go in at noon, And caused darkness on the land in a day of light,