Jesus answered, Are there not twelve hours in the day? If any man walk in the day, he stumbleth not, because he seeth the light of this world.
10 But if a man walk in the night, he stumbleth, because there is no light in him.
35 Then Jesus said unto them, Yet a little while is the light with you. Walk while ye have the light, lest darkness come upon you: for he that walketh in darkness knoweth not whither he goeth.
36 While ye have light, believe in the light, that ye may be the children of light. These things spake Jesus, and departed, and did hide himself from them.
11 And when I could not see for the glory of that light, being led by the hand of them that were with me, I came into Damascus.
12 The night is far spent, the day is at hand: let us therefore cast off the works of darkness, and let us put on the armour of light.
In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
13 But all things that are reproved are made manifest by the light: for whatsoever doth make manifest is light.
12 Giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light:
But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.
He that saith he is in the light, and hateth his brother, is in darkness even until now.
10 He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.
11 Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal;
… 
23 And the city had no need of the sun, neither of the moon, to shine in it: for the glory of God did lighten it, and the Lamb is the light thereof.
24 And the nations of them which are saved shall walk in the light of it: and the kings of the earth do bring their glory and honour into it.