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Where does the Bible say “let there be light”?

It is in Genesis 1:3 · King James Version

“And God said, Let there be light: and there was light.”
Read the chapter Genesis 1 →

See also

Genesis 1:1

In the beginning God created the heaven and the earth.

John 8:12

Then spake Jesus again unto 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.