Only about your "Dear Mr. Scientist" reference
Todd Clark not responsive to the question (unless the answer was in the link he provided).
Dr. Ali Khounsary either did not know what he was talking about, or expressed himself unclearly. He admitted not to be an expert though.
The rest of the responses were correct and consistent with each other.
What is your objection to what they said? Don't you believe that UV can initiate chemical reactions?