Revelation 22:5
And there shall be no night there; and they need no candle, neither light of the sun; for the Lord God giveth them light: and they shall reign for ever and ever. (Revelation 22:5)
They shall reign.
 Compare ch. 5:10. This does not mean they will reign over one another, nor over other worlds. It is probably, rather, a figure of the felicity of the redeemed. No longer will they be under the oppressive hand of some persecuting power.
They will enjoy the freedom and abundance of kings.
Giveth them light.
Textual evidence attests (cf. p. 10) the reading “will illuminate them.” This condition represents a re-establishment and recommencement of harmonious relations, which relations had been severed by sin.
No night.
 This verse draws a word picture emphasizing the insignificance of created luminaries in the presence of God. These will pale into nothingness in the presence of the glory of the divine person (see on ch. 21:23).