define "pure" energy though?
i think energy is a concept rather then a definable object
its the potential an object or event has to create a force
there are 4 types of forces
i think light is strong nuclear i.e it is a consequence of some sort of radiation be it from a chemical, electrical or nuclear source
although if i remember correctly weak gravitational force is the force that binds tiny particles (atoms nucleus's electrons) together
sound kinda like the force huh?