'Light' in the Bible

and if you are convinced that you are a guide for the blind, a light to those in darkness,

The night is almost over, and the day is near. Let's therefore put aside the actions of darkness and put on the armor of light.

Let's behave decently, as people who live in the light of day. No wild parties, drunkenness, sexual immorality, promiscuity, quarreling, or jealousy!