"I AM THE LIGHT OF THE WORLD" - Jesus
Jesus said to the people, "I am the light of the world. If you follow me, you won't be stumbling through the darkness, because you will have the light that leads to life." (John 8)
Tim Hughes from Britian wrote a wonderful worship song called, "Here I am to worship" (listen to a short sound bite) and here are the words:

Light of the world
You stepped down into darkness
Opened my eyes
Let me see
Beauty that made
This heart adore You
Hope of a life spent with You

REFRAIN
Here I am to worship
Here I am to bow down
Here I am to say
That You’re my God
You’re altogether lovely,
Altogether worthy
Altogether wonderful to me

King of all days,
Oh so highly exalted
Glorious in heaven above
Humbly You came
To the earth You created
All for love’s sake became poor

And I’ll never know how much it cost
To see my sin upon that cross