Yunus 10:5

It is He Who made the sun a radiant light[7] and the moon a reflected light[8], and precisely determined its phases, so that you may know the number of years and account [of time][9]. Allah has not created all of this except for a true purpose[10]. He makes the signs clear for people who know.

[7] Diyā’ is glowing with glaring light.
[8] Nūr is reflected light. [9] It provides concrete signs of Allah’s Lordship.
[10] The wisdom is to lead people to realize the Oneness of Allah.

It is He who made the sun a shining light and the moon a derived light and determined for it phases - that you may know the number of years and account [of time]. Allāh has not created this except in truth. He details the signs for a people who know.

5. It is He Who made the sun a shining thing and the moon as a light and measured out for it stages that you might know the number of years and the reckoning. Allâh did not create this but in truth. He explains the Ayât (proofs, evidence, verses, lessons, signs, revelations, etc.) in detail for people who have knowledge.

He it is Who appointed the sun a splendour and the moon a light, and measured for her stages, that ye might know the number of the years, and the reckoning. Allah created not (all) that save in truth. He detaileth the revelations for people who have knowledge.