careful guys.
Blue and ultraviolet light cannot penetrate deep into tissue. So at best this MAY by applicable for surface treatment. You certainly would never be able to reach a lymph node or penetrate more than a few mm into tissue (if that).
When they use a UV light to initiate polymerisation then this needs just a few radicals to start the chain reaction. In order to achieve anything medically relevant you need a much much stronger light to create a LOT more radicals (if that is the mechanism). Also, damaged DNA by radicals or other means got us to this board in the first place!!!

BTW here is the article

http://www.bio-medicine.org/biology...oth-fillings-stunts-tumor-growth-3747-1/

Note!! it does NOT say what type of tumor was treated nor how nor what wavelength or intensity of light was used.
To be open minded I am following this up but I am highly skeptical. If I hear anything credible I will post this.

M