1 Thessalonians 5:5 NIV
 You are all children of the light   and children of the day. We do not belong to the night or to the darkness.
2 Corinthians 6:14 NIV
 Do not be yoked together   with unbelievers.   For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness?  
Ephesians 5:8-14 NIV
 For you were once   darkness, but now you are light in the Lord. Live as children of light   (for the fruit   of the light consists in all goodness,   righteousness and truth) and find out what pleases the Lord.   Have nothing to do with the fruitless deeds of darkness,   but rather expose them. It is shameful even to mention what the disobedient do in secret. But everything exposed by the light   becomes visible—and everything that is illuminated becomes a light. This is why it is said: “Wake up, sleeper,   rise from the dead,   and Christ will shine on you.”  
John 12:36 NIV
 Believe in the light while you have the light, so that you may become children of light.”   When he had finished speaking, Jesus left and hid himself from them.  
John 5:35 NIV
 John was a lamp that burned and gave light,   and you chose for a time to enjoy his light.
John 8:12 NIV
 When Jesus spoke again to the people, he said, “I am   the light of the world.   Whoever follows me will never walk in darkness, but will have the light of life.”  
Philippians 2:15 NIV
 so that you may become blameless   and pure, “children of God   without fault in a warped and crooked generation.”    Then you will shine among them like stars in the sky
Proverbs 4:18 NIV
 The path of the righteous   is like the morning sun,   shining ever brighter till the full light of day.   
Romans 2:19-20 NIV
 if you are convinced that you are a guide for the blind, a light for those who are in the dark, an instructor of the foolish, a teacher of little children, because you have in the law the embodiment of knowledge and truth—