In the Garden of Eden, plants of every kind flourished before the sun and the moon were created--in the light that emanated from God. As in the beginning, lovely and useful as they are, the sun and the moon will no longer be needed in the new heavens and new earth, because God will make his home there with his people. God is light. In him there is no darkness at all—no dark side or force, so there will always be light.
Here is the final layer, my finished painting of The Light of God. Close-ups show the iridescent white and glimmering gold brushstrokes, which can only be seen when the light shines on it from certain angles—outshining the dull grey, lightless sun and moon sinking off the canvas.