You cannot show forth enduring light if you are not attached to Jesus, the light of the whole world.

We are light in the World, how far reaching is our light? Are you on a lamp-stand shining to all those in the house and before men in the world so that your Father in heaven may be glorified or are you under a bushel? Is important you know lest you get exhausted especially in our times when everything around us is making a demand on our time.

Read more @ http://overcomers-faith.org/light-in-darkness/

Or, you could use a solar powered flashlight. By nighttime it should've charged enough to give you all the light you need in the darkness