Dante, Convito , III 14, defines splendor as “reflected light.” Here it means the creation; the reflected light of God.

Job 38:7:⁠—

“When the morning stars sang together, and all the sons of God shouted for joy.”

“When the morning stars sang together, and all the sons of God shouted for joy.”

And again, 35:⁠—

“Canst thou send lightnings, that they may go, and say unto thee, Here we are?”