GOD is light.
The Bible asserts that GOD is light.
5 This is the message we have heard from him and declare to you: God is light; in him there is no darkness at all.
(1 John 1:5 NIV)
When GOD created the world in the beginning, the creation was only darkness. When GOD commanded light to shine forth, it was a revealing of Himself, for there was no sun, moon or stars at that point.
1 In the beginning God made heaven and earth. 2 The earth was invisible and unfinished; and darkness was over the deep. The Spirit of God was hovering over the face of the water. 3 Then God said, “Let there be light”; and there was light. 4 God saw the light; it was good; and God divided the light from the darkness. 5 God called the light Day; the darkness He called Night; and there was evening and morning, one day.
(Gen. 1:1-5 OSB)
In the Scriptures, light is closely tied to the concept of righteousness and freedom from sin. Returning to the above passage from 1 John, the very next statements read:
6 If we claim to have fellowship with [GOD] and yet walk in the darkness, we lie and do not live out the truth. 7 But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin.
(1 John 1:6-7 NIV)
To be associated with GOD is to be in the light. The apostle John introduced his account of Jesus with these words:
1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was with God in the beginning. 3 Through him all things were made; without him nothing was made that has been made. 4 In him was life, and that life was the light of all mankind. 5 The light shines in the darkness, and the darkness has not overcome it.
6 There was a man sent from God whose name was John. 7 He came as a witness to testify concerning that light, so that through him all might believe. 8 He himself was not the light; he came only as a witness to the light.
9 The true light that gives light to everyone was coming into the world. 10 He was in the world, and though the world was made through him, the world did not recognize him. 11 He came to that which was his own, but his own did not receive him. 12 Yet to all who did receive him, to those who believed in his name, he gave the right to become children of God— 13 children born not of natural descent, nor of human decision or a husband’s will, but born of God.
14 The Word became flesh and made his dwelling among us. We have seen his glory, the glory of the one and only Son, who came from the Father, full of grace and truth.
(John 1:1-14 NIV)
Where GOD exists, there is light.