Exodus 27:20 And thou shalt command the children of Israel, that they bring thee pure oil olive beaten for the light, to cause the lamp to burn always.
The Lord wanted the light to shine throughout the night. This was pure olive oil, specially prepared. This is the light to the nations. The priests kept the lamp ready and the people brought the oil.
In the New Testament we will hear Jesus talk about us being a light to the world. We will be taught to make sure our light shines so the world can see Jesus.
Jesus is the light of the world. We are to let our light shine!