Light shines on wickedness to allow for proper judgement; without light, no proper judgement can be made.
3 And God said, Let there be light: and there was light. 4
And God saw the light, that it was good: and God divided the light from the darkness.
And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.
19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20
For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.
But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
6 For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.
8 For ye were sometimes darkness, but now are ye light in the Lord: walk as children of light: 9
(For the fruit of the Spirit is in all goodness and righteousness and truth;)
Proving what is acceptable unto the Lord.
And have no fellowship with the unfruitful works of darkness, but rather reprove them.
For it is a shame even to speak of those things which are done of them in secret.
But all things that are reproved are made manifest by the light: for whatsoever doth make manifest is light.
Wherefore he saith, Awake thou that sleepest, and arise from the dead, and Christ shall give thee light.
4 Hearken unto me, my people; and give ear unto me, O my nation: for a law shall proceed from me, and I will make my judgment to rest for a light of the people.
105 Thy word is a lamp unto my feet, and a light unto my path.
4 But ye, brethren, are not in darkness, that that day should overtake you as a thief. 5
Ye are all the children of light, and the children of the day: we are not of the night, nor of darkness.
26 Fear them not therefore: for there is nothing covered, that shall not be revealed; and hid, that shall not be known. 27
What I tell you in darkness, that speak ye in light: and what ye hear in the ear, that preach ye upon the housetops.