Let's start from the very basics of primitive life, like rubbing a stick on stone to make a fire.
Yes, yes, I know that science is much more advanced than this...but it wasn't at one time and all things happen because of a frequency, a vibration/friction and the energy to create it to the energy created from it.
If you were to rub your stick along a stone at a slow pace, you will find that your stick becomes warm and makes a reasonably audible sound. If you speed up that rubbing, you find that the audible sound gets less and less and yet the stick starts to glow at the end.
This is all you should need to know to tell you that you do not get light, no matter how much you think it over...if you do not have SOUND.
The trouble with you high forehead scientists, is, you dare not even think on simple lines because it makes your science less amazing to the masses if it was explained in simplistic terms, this is why you all go into spasms when someone comes along to kick you into shape...you all go into the pack mentality of attempted intimidation by using pathetic formulas and ridiculous equations to explain something that in reality can be explained to a child in a way they can understand.
Thankfully there's only a hand full of people on here that do this, as many people actually have enough about them to at least question stuff.