Life and light both speak of energy. The Bible is the story of the travel of life and light through history. Life and light are always outward bound. The New Testament word for light means to shine, radiate, or manifest. It would be too much to attempt a biblical study of light.
Light is the substance of the day, and the absence of it causes night.
They camped around the light. Solomon stated that the path of the righteous is like the bright light of the sun that shines brighter and brighter until the full day. The following chapter, Isaiah 61, is a great chapter on real and radiant evangelism. I believe that we need to review the Scriptures continually, and study in the presence of the Holy Spirit, in order to allow Him to reveal God's ways to us more clearly. God wants to use us for His purpose.