Light

Electromagnetic radiation (Einstein's E), including visible light, is the energy carrier for the radiant/positive energy produced by chemical reactions of matter. Light (radiating energy) consists of photons, a kind of boson, which is an elementary particle of energy identical to a fermion, but with double the spin. This double spin somehow allows photons to be indiscrete, so they can be in the same place at the same time. On the other hand, Fermions (the basis of matter) are discrete, thus cannot be in the same place at the same time. They are “solid.” The virtuality of photons, considered with their mass of 0, qualifies them as non-matter. However, it’s important to note that light, although non-matter, is still individuated (in the form of separate quanta/photons/waves).