Why has the Light of God been compared to a man-made lamp instead?

Why has the Light of God been compared to a man-made lamp instead? It must be stated in reply that: Firstly, the sun, with all its illumination, benefits and effects on living beings is still only one of the creations of God in the system of the universe; it is merely carrying out the task it was designed for.

If God compared His light with that of the sun, it would indicate a diminution from the state of the Creator to the level of the created, and this is contrary to the exalted nature of God, whose Power extends over all His creation; an ordinary believer when walking through nature and pondering over these same celestial phenomena and the objective behind their creation will be able to acknowledge and infer His existence. Secondly, a believer, an unbeliever and every human being, irrespective of…