I say plasma, fire, and sub-zero flame should be in the same category, doesn't matter which. They are basically the same thing at different temperatures.

I say Photons could perhaps be added into a new "LIGHT" category, along with Glass, Filter, Breakable metal, and perhaps LCD.

@kamikai
@therocketeer
In the 2.5 version of my mod, it will be done.

It does make sense considering a photon is a form of electromagnetic radiation.

Very true,a photon is light and in phisics considered radioactive.