'Light' in the Bible

This is but a light thing in the sight of Yahweh. He will also deliver the Moabites into your hand.

Then they said one to another, "We aren't doing right. This day is a day of good news, and we keep silent. If we wait until the morning light, punishment will overtake us. Now therefore come, let us go and tell the king's household."

Hezekiah answered, "It is a light thing for the shadow to go forward ten steps. Nay, but let the shadow return backward ten steps."