quote: Please supply the scientific theory of how God created light when he said "let there be light". Please include the testable elements of the process by which light was created.
include evidence supporting this theory.
Interesting question. My first reaction is that your question is somewhat self-contradictory. Young-earth creationists (YECs) generally see a conflict between science and creation; they want to support creation in part by showing that scientific explanations fail. So why did they invent "creation science"? I think there are a number of political and other reasons, but the term is a bit of an oxymoron.
For their own description of "creation science", see their CreationWiki article: http://creationwiki.org/Creation_science. If you read between the lines (and if you've followed them at all) you will see that they are not trying to generate a comprehensive scientific theory for everything. What they are trying to do is to find errors in the current scientific paradigm so they can dismiss it, and to find scientific support for a fundamentally religious position. With only a few rare exceptions, their "science" consists of collecting isolated data points rather than developing a comprehensive theory.
Back to your question. I've never seen the YECs propose a scientific explanation for the origin of light. As others have said, I believe they want to see it as an unexplainable miracle. OEC (old-earth creationist) proponents, who do not hold to "creation science", tend to accept the dominant scientific paradigm. Hugh Ross, for example, associates the "let there be light" of Gen 1:3 with the end of the "dark ages" in the early universe.
"Science without religion is lame, religion without science is blind." – Albert Einstein
“I am very astonished that the scientific picture of the real world around me is very deficient. It gives us a lot of factual information, puts all of our experience in a magnificently consistent order, but it is ghastly silent about all and sundry that is really near to our heart, that really matters to us. It cannot tell us a word about red and blue, bitter and sweet, physical pain and physical delight; it knows nothing of beautiful and ugly, good or bad, God and eternity. Science sometimes pretends to answer questions in these domains, but the answers are very often so silly that we are not inclined to take them seriously.” – Erwin Schroedinger