'Brightness' in the Bible

Six days later, Jesus took with Him Peter and James and John, and led them up on a high mountain by themselves. And He was transfigured (changed in form) before them [and began to shine brightly with divine and regal glory];

who appeared in glory, and were speaking of His departure [from earthly life], which He was about to bring to fulfillment at Jerusalem.

Now Peter and those who were with him had been overcome with sleep; but when they were fully awake, they saw His glory and splendor and majesty, and the two men who were standing with Him.

if then thy whole body is lightened, not having any part darkened, the whole shall be lightened, as when the lamp by the brightness may give thee light.'

“Since I couldn’t see because of the brightness of that light, I was led by the hand by those who were with me, and came into Damascus.

At midday, O king, I saw in the way a light from heaven, above the brightness of the sun, shining round about me and them which journeyed with me.

If, however, the service that proclaims death--its code being engraved in writing upon stones--came with glory, so that the children of Israel could not look steadily on the face of Moses because of the brightness of his face--a vanishing brightness;

And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming:

Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high;

And He who sat there appeared like [the crystalline sparkle of] a jasper stone and [the fiery redness of] a sardius stone, and encircling the throne there was a rainbow that looked like [the color of an] emerald.