The Lights Are On

The lights are on, but should they be?  In trying to be energy conscious, our household is attempting to turn lights off when we are not in need of them.  From that perspective, I can't imagine turning on a bright lamp, and then covering it up or hiding it in a closet. 
Jesus used such an illustration in Matthew 5: 13-16.  He said ". . . you are the light of the world . . . people do not light a lamp and put it under a bowl.  Instead, they put it on its stand and it gives light to everyone in the house.  In the same way,  let your light shine . . . so your good deeds may be seen  and your Father in Heaven be praised."

Our world is so very dark in many ways for people all over the world.  If we have Light, why aren't we using it?  Why are we keeping it for ourselves?