Photons do not seem to be very well defined in quantum mechanics like an electron or even a quark. My assumption is that the relationship between the quantum and classical views on radiation must be fleshed out to some extent. Ive read in several places that quantum mechanics converge into classical mechanics when expanding into the larger scales where particle wavelengths no longer matter. Details are thin in nontechnical descriptions of quantum theory so its possible that they are only talking about classical mechanical physics and the answer to this question is that there is no known relationship.
How does the concept of photons build up into something that looks like a classical electromagnetic wave?