Thanks Allen,
Not to be a pain, but I must disagree with some of their information. My biggest objection was to the comment “which in most of the cases is lethal”. Depending on the study, the 5-year survival rate for melanomas is from 91% - 99% (its lower if it gets into the lymph system). Further review on the web has been very disappointing. The documented medical research I found from NASA, research hospitals et al, was contradictory. Some say UV A causes cancer; some say UV B causes cancer, or all of the above (studies within the past 5 years). My training says sunburns come from UV A (as does vitamin D production) where as UV B causes cancer due to DNA damage. I have also read research that concludes that the increase in skin cancer is not so much from UV as it is from the chemicals used in suntan lotions (with a few exceptions). I do agree about UV A and the eyes. Mostly from being in the snow, desert or on the water. That is well documented.
As it applies to our hobby, the UV rays from the actinics are minuscule and lack much energy to do any real harm. I do not intend to stare at them though.
Ok, I’m off my soapbox.