John 8:12

Then spake Jesus again to them, saying, I am the light of the world; he that followeth me, shall not walk in darkness, but shall have the light of life.

John 12:46

I am come a light into the world, that whosoever believeth on me, may not continue in darkness.

Ephesians 5:8

For ye were once darkness, but now ye are light in the Lord:

Ephesians 5:14

Wherefore he saith, Awake thou that sleepest, and arise from the dead, and Christ shall give thee light.

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 spake Jesus again to them, saying, I am the light of the world; he that followeth me, shall not walk in darkness, but shall have the light of life.
John 12:46
I am come a light into the world, that whosoever believeth on me, may not continue in darkness.
Ephesians 5:8
For ye were once darkness, but now ye are light in the Lord: