'Light' in the Bible

Look! The one who crafts mountains, who creates the wind, who reveals what he is thinking to mankind, who darkens the morning light, who tramples down the high places of the land the LORD, the God of the Heavenly Armies is his name.

"Woe to those who are craving the Day of the LORD! How is it to your benefit, this Day of the LORD? It's a day of darkness to you, and not light.

Will not the Day of the LORD be darkness, and not light pitch black at that, without a ray of sunshine?"