The Celestial Bodies' Light

The Quran differentiates between the lights of celestial bodies—referring to the moon’s light as reflected light (“nur”) and the sun’s light as a lamp (“siraj”). This distinction corresponds to the fact that the moon does not emit its own light but reflects the light of the sun, while the sun generates light through nuclear fusion.

هُوَ ٱلَّذِى جَعَلَ ٱلشَّمْسَ ضِيَآءًۭ وَٱلْقَمَرَ نُورًۭا وَقَدَّرَهُۥ مَنَازِلَ لِتَعْلَمُوا۟ عَدَدَ ٱلسِّنِينَ وَٱلْحِسَابَ ۚ مَا خَلَقَ ٱللَّهُ ذَٰلِكَ إِلَّا بِٱلْحَقِّ ۚ يُفَصِّلُ ٱلْءَايَٰتِ لِقَوْمٍۢ يَعْلَمُونَ

It is He who made the sun radiant, and the moon a light, and determined phases for it—that you may know the number of years and the calculation. God did not create all this except with truth. He details the revelations for a people who know.

The Holy Quran · Yunus (Jonas) · 10:5

وَجَعَلَ ٱلْقَمَرَ فِيهِنَّ نُورًۭا وَجَعَلَ ٱلشَّمْسَ سِرَاجًۭا

And He set the moon in their midst for light, and He made the sun a lamp.

The Holy Quran · Nooh (Noah) · 71:16