'Light' in the Bible

And this is but a light thing in the sight of the LORD: he will deliver the Moabites also into your hand.

Then they said one to another, We do not well: this day is a day of good tidings, and we hold our peace: if we tarry till the morning light, some mischief will come upon us: now therefore come, that we may go and tell the king's household.

Yet the LORD would not destroy Judah for David his servant's sake, as he promised him to give him alway a light, and to his children.

And Hezekiah answered, It is a light thing for the shadow to go down ten degrees: nay, but let the shadow return backward ten degrees.