'Radiant' in the Bible

She has been permitted to dress in fine linen, dazzling white and clean—for the fine linen signifies the righteous acts of the saints [the ethical conduct, personal integrity, moral courage, and godly character of believers].

“I, Jesus, have sent My angel to testify to you and to give you assurance of these things for the churches. I am the Root (the Source, the Life) and the Offspring of David, the radiant and bright Morning Star.”