fulgent

"The weary Sun betook himself to rest; — / Then issued Vesper from the fulgent west." That's how the appearance of the evening star in the glowing western sky at sunset looked to 19th-century poet William Wordsworth. Fulgent was a particularly apt choice to describe the radiant light of the sky at sunset. The word derives from the Latin verb fulgēre, meaning "to shine," a root which is itself akin to the Latin flagrare, meaning "to burn." English speakers have been using fulgent to depict resplendence since at least the 15th century.