What is light? It is important to realize that in physics today, we have no knowledge of what energy is. We do not have a picture that energy comes in little blobs of a definite amount. It is not that way. -Feynman All these fifty years of conscious brooding have brought me no nearer to the answer to the question, “What are light quanta?” Nowadays every Tom, Dick, and Harry thinks he knows it, but he is mistaken. - Einstein Light is energy, energy must coexist with matter/medium. Therefore no light in the vacuum space. You can prove it by passing a color laser beam through a vacuum glass container, the beam will disappear in the container. Scientists still don't know the fact that light/energy/radiation is instantaneous in vacuum space. Sunlight does not travel in vacuum space at light speed, sunlight induces lights on all planets simultaneously. Light speed is the speed of alternating electrostatic force propagating in a medium.

Energy/light/radiation transfer between matters instantly through universal repulsion force/so-called levity. There is no EM wave/photon traveling in the vacuum space at light speed. All scientists are mistaken.