What is light?

Light is the natural agent that stimulates sight and makes things visible.

“the light of the sun”
synonyms: illumination, brightness, luminescence, luminosity, shining, gleaming, gleam, brilliance, radiance, lustre, glowing, glow, blaze, glare, dazzle;

Light is spiritually spoken into existence:

Light can also be the spiritual state in which things which are prayed or prophetically spoken come into their physical reality, bringing them out of darkness into the existence of illuminated light.

Genesis 1:1-3 (NKJV)

1 In the beginning God created the heavens and the earth.

2 The earth was without form, and void; and darkness was on the face of the deep.

And the Spirit of God was hovering over the face of the waters.

3 Then God said, “Let there be light” (Hanukkah); and there was light.

Light is a energy:

Light is a type of energy. It is a form of electromagnetic radiation of a wavelength which can be detected by the human eye.

It is a small part of the electromagnetic spectrum and radiation given off by stars like the sun. …

Light exists in tiny energy packets called photons.

What is a photon?

A photon is a particle of light defined as a discrete bundle (or quantum) of electromagnetic (or light) energy.

Photons are always in motion and, in a vacuum (a completely empty space), have a constant speed of light to all observers.