Laws for lights on bicycles are generally separate from laws for lights on motorized vehicles. For instance, in California, the law requires 5-9 reflectors and a white headlight, but only disallows a blue light. Any light of any kind other than blue is allowed.

http://dmv.ca.gov/pubs/vctop/d11/vc21201.htm

I expect/hope that if so, any attempt to prosecute would result in wide media coverage/negative publicity for the prosecutor. The case would be dropped, and/or the product would be made legal - by adjustment of the law and/or the Nori.