I have come across some observations which depict an interesting correlation between God and light in the major world religions....

In Hinduism, the Vedas and Hindu scriptures considers the Shivalinga as representing a cosmic pillar of light. The Dharmic monotheistic sect the Prajapita Brahmakumaris consider God to be an incorporeal point of light.

The Upanishads and enlightened masters have also described Brahman to be self-luminous.

Sikh teachings also reveal God to be self-luminous. (Amongst all is the Light-You are that Light. (13-5, DnwsrI, m 1 ) )

Similarly, the Abrahamic religions also associate God with light.

In Islam, Allah has 100 name's, and one of them is Alnoor ( the Light).

“God is light,” says 1 John 1:5, in the Bible in Christianity.

In Judaism, Psalm 76:4 says of God, “You are radiant with light.”

In the Bahai religion, it is stated thus, "This is the Day whereon naught can be seen except the splendors of the Light that shineth from the face of Thy Lord, the Gracious, the Most Bountiful."(Baha'u'llah, Gleanings from the Writings of Baha'u'llah, p. 29)

So this correlation between God and light, is a common denominator in these major world religions.

Imo, the fire worship in Zoroastrianism may be illustrating this correlation between God (Ahura Mazda ) and light as well,light being emitted by the fire.

I would say this may provide more proof that the major world religions are identical in their core, with only superficial differences on the outside creating cause for extremism and conflict. If you find any further proofs or evidences in this regard, please do share it here.

Thanking in advance.