What light did God create in the beginning?

He created the world, not light. Answer The light in Genesis 1:3 was not the light from the sun, but light emanating from the very throne of God as God's light from his glory shone on the darkness of the world, as he initiated the events that followed (the creation or remaking of the earth). Light always was, as God always was. All matter interestingly is condensed light energy! In 1 John 1:5 we read that, "..God is light, and in Him is no darkness at all". What all that means, Ive no idea, but light is eternal, as God is. Apparently the Light from the glory of God is so powerful that were he to personally appear uncloaked in all his glory upon the earth, the earth and everything in it would be annihilated. Something about sin, introduced darkness both to the Universe, to the world, to our hearts, and to our souls, so much so that we literally cannot stand directly in His presence in our condition, lest we become consumed as by a ball of fire. This is part of the reason for his mainly indirect communication to man through prophets etc, inspired by the Holy Spirit of God, which cannot be seen. Its also why when He appeared to Israel during the Exodus of Moses day, that he appeared clothed by a cloud, to shield the people from His consuming light. So He never created light, it is part of Gods very nature and inseparable from God.