The City of Light

Light cone is the great city (the holy city) of light described in Revelation 21:10-27. The term 'light' here implies Wisdom. Whoever has understanding of the meaning of the city has seen the Holy City. He or she is himself or herself the holy city, because the city is Wisdom (light) in his or her memory.
The city, descending from heaven, is a mystery being unraveled,
The great city, the holy Jerusalem, descending out of heaven from God.            (Revelation 21:10) "KJV"
That great city: Light Cone (the city of light)
Heaven: the sky

The light cone is the kingdom of God coming to dwell in the hearts of men. Jesus, knowing that the kingdom of God is about divine information in the hearts of men, said,
 No one will say, ‘Look, here it is!’ or, ‘There it is!’; because the Kingdom of God is within you. (Luke 17:21) "GNT"
Light cone is made up of two lamps pointing in opposite directions. The lamp pointing downwards is the Past Light Cone, the lamp pointing upwards is the future light cone, and the mid-point between the two lamps is the Hypersurface of the Present.

The Hypersurface of the Present is the Perfect Square described as follows,
The city was perfectly square, as wide as it was long. (Revelation 21:16) "GNT"
Perfect Square = Foursquare

Foursquare: square 1, square 2, square 3, and square 4.

Lunar halo is the 'ring of light' representing the twelve hours of the night (ie. sunset to sunrise). The twelve hours of the night are the twelve gates or the twelve pearls, where sixty minutes (an hour) is equal to a pearl or a gate.
The twelve gates were twelve pearls; each gate was made from a single pearl. (Revelation 21:21) "GNT"
12 Gates = 12 Hours (Night)
A Pearl = 60 Minutes

Since 60 Minutes is equal to an hour, a pearl is equal to an hour.
The lunar halo is the 'ring of light' (Black Hole 1) at the base of the Past Light Cone. It is the light pointing towards the past.

The solar halo is the 'ring of light' or the glory representing the twelve hours of the day (i.e. from sunrise to sunset). The twelve hours of the day are the twelve foundations or the twelve precious stones, where every 60 minutes (every hour) is equal to a precious stone or a foundation stone.
The city's wall was built on twelve foundation stones, on which were written the names of the twelve apostles of the Lamb. (Revelation 21:14) "GNT"
12 Foundations = 12 Hours (Day)
The foundation stones of the city wall were adorned with all kinds of precious stones. (Revelation 21:19) "GNT"
The fact that the precious stones are reflecting different colours reveals that the holy city is about the different colours constituting white light. The different colours are Islam, Taoism, Christianity, Hinduism, Judaism, and Buddhism, Physics, Astronomy, Mathematics, Poetry, Biology, Geography, etc.

God is unity in diversity.