Jesus tells us what to do with this light in Matthew 5:16 "Let your light so shine before men, that they may see your good works and glorify your Father which is in Heaven."
Some good works that are listed in the 25th chapter of Matthew are: Visiting the sick, feeding the hungry, providing clothes to the needy and visiting those in jail or prison. We also know that sharing the GOOD NEWS of JESUS is how we let out light shine.
let's borrow a slogan from Motel 6, and LEAVE THE LIGHT ON!!