luminous energy
A lot
Albert Einstein called the quanta of light energy "photons."
Photosynthesis.
In chemical bonds, in the molecule that we call Sugar.
The two types of energy produced when a light is turned on are light energy and heat energy. Light energy allows us to see the illuminated space, while heat energy is a byproduct of the light-producing process.
20%
Light is pure energy in the form of what we call Photons.
We call most of them heat, light, and x-rays.
An object that produces its own heat and light energy is called a "self-luminous object." This term is often used to describe things like stars or artificial sources of light that generate their own energy.
To brighten your way in the dark. The light bulbs' energy is reflected forward so you can see things in low light conditions. We call them flashlights.
Light. Note that light is a special case of electromagnetic waves; but if it isn't visible light, you wouldn't call it a "light wave", just an "electromagnetic wave".
Well, you might just put it in a separate category, and call it "light energy". But it is probably better to place it in the broader category of "electromagnetic waves".