'Radiant' in the Bible

There was the likeness of the appearance of a human being seated on the likeness of the throne high above. I noticed that from what appeared to look like his waist upward there was something that looked like metal that glowed as if it were immersed in fire. Below this there was something resembling fire, with a radiant light surrounding him.

The appearance of the radiant light resembled that of a rainbow shining in a cloud on a rainy day. This was what the appearance of the form of the glory of the LORD resembled. When I saw all of this, I fell flat on my face. Then I heard a voice speaking.