'Brightness' in the Bible

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.'

at mid-day, I saw in the way, O king, out of heaven, above the brightness of the sun, shining round about me a light -- and those going on with me;

who being the brightness of the glory, and the impress of His subsistence, bearing up also the all things by the saying of his might -- through himself having made a cleansing of our sins, sat down at the right hand of the greatness in the highest,