'Brightness' in the Bible

Thou, O king, sawest, and, behold, a great image. This image, which was mighty, and whose brightness was excellent, stood before thee; and the aspect thereof was terrible.

At the same time mine understanding returned unto me; and for the glory of my kingdom, my majesty and brightness returned unto me; and my counsellors and my lords sought unto me; and I was established in my kingdom, and excellent greatness was added unto me.

And they that are wise shall shine as the brightness of the firmament; and they that turn many to righteousness as the stars for ever and ever.