'Light' in the Bible

And he said to me, What do you see? And I said, I see a light-support, made all of gold, with its cup on the top of it and seven lights on it; and there are seven pipes to every one of the lights which are on the top of it;

For who dares make light of small beginnings? These seven eyes will joyfully look on the tin tablet in Zerubbabel's hand. (These are the eyes of the Lord, which constantly range across the whole earth.)

And I made answer and said to him, What are these two olive-trees on the right side of the light-support and on the left?

And it shall come to pass in that day, that the light shall not be clear, nor dark:

But it shall be one day which shall be known to the LORD, not day, nor night: but it shall come to pass, that at evening time it shall be light.