Always, the Bible is its own best commentary.  For example, the following verses:

Do all things without complaining and disputing, that you may become blameless and harmless, children of God in the midst of a crooked and perverse generation, among whom yu shine as lights in the world. (Philippians 2:15)  You are the light of the world. (Matthew 5:14)  For you were once darkness, but now you are light in the Lord.  Walk as children of light. (Ephesians 5:8)  Let your light so shine before men, that they may see your good works and glorify your Father in Heaven. (Matthew 5:16)  I say to you that likewise there will e more joy in Heaven over ne sinner who repents than over ninety-nine just persons who need no repentance. (Luke 15:7)  If we walk in the light as He is in the light, we have fellowship with one anther, and the blood of Jesus Christ His Son cleanses us from all sin. (I John 1:7)

WOW!  How beautiful is that!  That is what light is all about.  We are called upon to shun sin, follow Jesus, and be the light of the world that all men can see today, and thus attract them to the Lord.

What say ye?