Charles Ellicott Commentary Revelation 22:5

"And there shall be night no more; and they need no light of lamp, neither light of sun; for the Lord God shall give them light: and they shall reign for ever and ever." — Revelation 22:5 (ASV)

And there shall be no night there...—Rather, And night shall be no more, and (they shall not have) need of the light of a lamp, and of the light of the sun, because the Lord God shall shine upon them, and they shall reign for ever and ever.

There will be no night. It is said twice (Revelation 21:25) that all darkness will cease; the darkness in which the saints and sorrowing walked will be dispelled, when God gives them light. No artificial light is needed, since He who is Light is their light. Those who were children of light now dwell in the light of God’s countenance; and they reign who were made kings and priests to God (Revelation 1:6).

With this utterance the visions of the Apocalypse close. The saints of God have been seen in the bitterness and toilfulness of their struggle and pilgrimage towards the Holy City; but from point to point they have made progress. They have gone from strength to strength; before the God of gods appeareth every one of them in Zion. The Lord God is their sun and shield. He has given grace; He now gives glory. No good thing has been withheld; light, life, and love are theirs. O Lord God of Hosts, blessed is the man that trusteth in Thee (Psalms 84:11–12).