John 1:1-12:
1 In the beginning was the Word, and the Word was with God, and the Word was God.
2 He was in the beginning with God.
3 All things were made through Him, and without Him nothing was made that was made.
4 In Him was life, and the life was the light of men.
5 And the light shines in the darkness, and the darkness did not comprehend it.
6 There was a man sent from God, whose name was John.
7 This man came for a witness, to bear witness of the Light, that all through him might believe.
8 He was not that Light, but was sent to bear witness of that Light.
9 That was the true Light which gives light to every man coming into the world.
10 He was in the world, and the world was made through Him, and the world did not know Him.
11 He came to His own, and His own did not receive Him.
12 But as many as received Him, to them He gave the right to become children of God, to those who believe in His name:

1 John 1:5-7:
5 This is the message which we have heard from Him and declare to you, that God is light and in Him is no darkness at all.
6 If we say that we have fellowship with Him, and walk in darkness, we lie and do not practice 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 Christ His Son cleanses us from all sin.

John 1:4-5:
4 In Him was life, and the life was the light of men.
5 And the light shines in the darkness, and the darkness did not comprehend it.

John 8:12:
Then Jesus spoke to them again, saying, “I am the light of the world. He who follows Me shall not walk in darkness, but have the light of life.”

John 12:35-36, 44-46:
35 Then Jesus said to them, “A little while longer the light is with you. Walk while you have the light, lest darkness overtake you; he who walks in darkness does not know where he is going.
36 While you have the light, believe in the light, that you may become sons of light.” These things Jesus spoke, and departed, and was hidden from them.
...
44 Then Jesus cried out and said, “He who believes in Me, believes not in Me but in Him who sent Me.
45 And he who sees Me sees Him who sent Me.
46 I have come as a light into the world, that whoever believes in Me should not abide in darkness.

Isaiah 9:1-2, 6:
1 Nevertheless the gloom will not be upon her who is distressed,
As when at first He lightly esteemed
The land of Zebulun and the land of Naphtali,
And afterward more heavily oppressed her,
By the way of the sea, beyond the Jordan,
In Galilee of the Gentiles.
2 The people who walked in darkness
Have seen a great light;
Those who dwelt in the land of the shadow of death,
Upon them a light has shined.
...
6 For unto us a Child is born,
Unto us a Son is given;
And the government will be upon His shoulder.
And His name will be called
Wonderful, Counselor, Mighty God,
Everlasting Father, Prince of Peace.

Psalm 27:1:
The Lord is my light and my salvation;
Whom shall I fear?
The Lord is the strength of my life;
Of whom shall I be afraid?

Isaiah 60:19:
“The sun shall no longer be your light by day,
Nor for brightness shall the moon give light to you;
But the Lord will be to you an everlasting light,
And your God your glory.

Micah 7:8:
Do not rejoice over me, my enemy;
When I fall, I will arise;
When I sit in darkness,
The Lord will be a light to me.