And after these things - After the vision referred to in the previous chapter.
I saw another angel come down from heaven - Different from the one that had last appeared, and therefore coming to make a new communication to him. It is not unusual in this book that different communications should be entrusted to different angels. Compare Revelation 14:6, Revelation 14:8-9, Revelation 14:15, Revelation 14:17-18.
Having great power - That is, he was one of the higher rank or order of angels.
And the earth was lightened with his glory - The usual representation respecting the heavenly beings. Compare Exodus 24:16; Matthew 17:2; Luke 2:9; Acts 9:3. This would, of course, add greatly to the magnificence of the scene.