What does “the life was the light of men” mean in John 1:4?

What does ἡ ζωὴ ἦν τὸ φῶς τῶν ἀνθρώπων mean in John 1:4? John 1:4 (KJV); In him was life; and the life was the light of men. The best I can come up with is the knowledge of Jesus’ exemplary life shows us how to live.: τὸ φῶς τῶν ἀνθρώπ…