UV can be dangerous and this has been discussed here before as well as the applications of UV light. However, this is a subject drift from this this thread and I still want to know if Lumileds has ever made a UV die?!?!?! /ubbthreads/images/graemlins/nana.gif
As an interesting aside, at least I think so, Nichia has done some cool stuff with UV dies and phosphor to gain good control and output of white light. UV does excite the phosphor to a greater extent than blue light (typical base for white LED's) as I understand it but if the LED were to be compromised, instead of blue light emanating, you could have dangerous and hardly visible UV light getting out.