Hi,
I actually researched this for an article and I think the official word on it is that they are safe enough to use - obviously all exposure to UVA or UVB rays carries a risk but the time and intensity of it is no worse than say driving in the sun for a few minutes. Preventative measures would be to use a high factor SPF before going under or putting a cloth between your hand and the lamp.
More info on the research and tests here:
http://www.nailsmag.com/article/1284/uv-nail-lamps-are-safe-say-industry-expertsHope that helps!
Judy
Comments
http://www.skincancer.org/prevention/uva-and-uvb/understanding-uva-and-uvb
I would highly recommend to read this scientific report before starting to spread scaremongering panic: http://www.schoonscientific.com/downloads/UV-Nail-Lamp-Facts.pdf
The reason I was concerned is that in my country (New Zealand) we have no ozone layer to protect us by stopping rays and so the UV rays are very strong and it is common to get burned on a cloudy day and skin cancer is a big problem in NZ. I want nice nails but was getting scared after reading the (incorrect) reports on the internet. Thanks!