Let There Be Light (Fiat lux in Latin) is one of the most famous phrases in the English language, due to its presence in the third verse of the King James Bible:

• Genesis 1:1 - In the beginning God created the heaven and the earth.
• 1:2 - And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
• 1:3 - And God said, Let there be light: and there was light.
• 1:4 - And God saw the light, that it was good:

Let There Be Light is an elegantly written comic diary by the English humourist Tony Gillan, published in 2001.

The title refers to the Stadium of Light, the home of Sunderland A.F.C., a football club. Despite the fact that the diaries are based on the time the author spent as an employee of the club, the book is not really concerned with football, but provides a vehicle for comic descriptions of modern life.

The book has given cult status to the Ivy House pub in Sunderland, now a minor tourist attraction.