Rev 22:5, Isa 60:19-20, Jn 1:9, Jn 8:12
In the Old Testament it was prophesied that we would no longer need the light of the sun and moon and that God would be our eternal light. (Isa 60:19-20)
Isa 60:19 The sun shall be no more thy light by day; neither for brightness shall the moon give light unto thee: but the Lord shall be unto thee an everlasting light, and thy God thy glory. 20 Thy sun shall no more go down; neither shall thy moon withdraw itself: for the Lord shall be thine everlasting light, and the days of thy mourning shall be ended.
Jesus is the true light of the world. (John 1:9, John 8:12)
John 1:9 That was the true Light, which lighteth every man
John 8:12 Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.
The light of the sun and moon is no longer needed in heaven. Because God and Jesus Christ are our true light. (Rev 21:23, Rev 22:5)
Rev 21:23 And the city had no need of the sun, neither of the moon, to shine in it: for the glory of God did lighten it, and the Lamb is the light thereof.
Rev 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.