don't know if this discussion is still going, but just one or two notes...
The fundamental interactions of particles are: gravity, electromagnetism, weak and strong interaction. Electromagnetic and weak interaction are thought to be the same interaction as recent experiments indicate (similar to the fact that electric and magnetic forces are the same ... not the best analogy, I know). It is quite possible that the strong interaction and the electroweak interaction are related in much the same way (I honestly do not know if there has been experimental evidence to this yet). The next generation of particle accelerators (large hadron colliders) will probably shed some more light into this.. If anybody has fit gravity into this picture yet, escapes me.
to wise: I think some clarification on your part is needed: When you say light, is it visible electromagnetic radiation you are meaning? or electromagnetic radiation in general? Or are you saying electromagnetic interactions in general?
If it is one of the first two you will have to clarify as to how evolution (or indeed life) is rendered impossible by the absence of electromagnetic radiation (whatever wavelength), however improbable the (total) absence of electromagnetic waves is ..
If it is the latter your point is moot, as evolution explains the biological development of lifeforms in our universe...
As stated, light did not evolve in any way biological lifeforms do, but is just the property of nature that matter will under certain conditions "loose" energy in the form of photons...
best regards
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