“You are the light of the world. A city set on a hill cannot be hid. Nor do men light a lamp and put it under a bushel, but on a stand, and it gives light to all in the house. Let your light so shine before men, that they may see your good works and give glory to your Father who is in heaven.” (Matthew 5:14-16)
One of the Matins hymns from the Week of Pentecost describes how believers become light dawning on the world.
Savior, You have filled Your apostles with the light of the Spirit!
He has made them as the sun at dawn,
For they have burned the fog of error from the face of the earth!
They have illumined the souls of the faithful,
Teaching them to adore Your Father and the most-Holy Spirit,
Who sanctifies those who worship You!
We Christians are not to be just a candle lit in the face of overwhelming darkness. Rather we are illumined to be like the sun which overwhelms the darkness, bringing light to every nook and cranny in the world as well as in our hearts!