John 8:12

Then Jesus again addressed them, saying, "I am the light of the world: he who follows me will not walk in darkness, he will enjoy the light of life."

John 12:46

I have come as light into the world, that no one who believes in me may remain in the dark.

Ephesians 5:8

For while once upon a time you were darkness, now in the Lord you are light; lead the life of those who are children of the light

Ephesians 5:14

Thus it is said, 'Wake up, O sleeper, and rise from the dead; so Christ will shine upon you.'

Treasury of Scripture Knowledge

Summary

When his candle shined upon my head, and when by his light I walked through darkness;

Bible References

By his light

John 8:12
Then Jesus again addressed them, saying, "I am the light of the world: he who follows me will not walk in darkness, he will enjoy the light of life."
John 12:46
I have come as light into the world, that no one who believes in me may remain in the dark.
Ephesians 5:8
For while once upon a time you were darkness, now in the Lord you are light; lead the life of those who are children of the light