Why did God say "Let there be Light" if God could already see without Light ever since Infinity began in the first place?

LOL!

God does not need eyes to detect what is. God is not Physical. Therefore all that we consider to be in existence is a Creation.

The physical universe is a Creation and everything that is part of the physical universe is either Matter, Energy Space or Time.

This universe can not exist without those 4 basic components. Prior to the creation of this universe it could be those components did not exist.

Therefore what is "spiritual" exists in a manner that is detached from the rules or laws of physics since the Spiritual existed outside of the physical even before the beginning of creation.

We can observe the effect of the Spiritual on the Physical but there is measuring instrument that can measure what isn't physical.

Christians enjoy saying god says this and god says that but they can never prove it.

This light of having physical property of having energy,mass,space and time is actually originated from the Noor or Radiant of GOD that has no bound.ie no beginning nor ending.

Who said He created light for himself?

Infrared

In these Scriptures referring to creation, God created these things for man. Not himself. Man needs light. God does not.

Some beings don't need eyes or light to see.

Light brings life.

All life on this planet derives sustenance from light. The plants directly, the herbivore from eating the plant, the carnivore from eating the herbivore

If you were going to create life on a planet, the first thing you need is light

You yourself gave the reason !! He is preparing for the Creatures that Creation exists for. You have the answer right in your question !!!!

The light wouldn't be for Him, would it?

Duh!