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UVA Radiation

Ozone, or O3, is a molecule that plays an important role in regulating the Earth's temperature. Located in the stratosphere, an area that begins between 6 and 10 miles above the su...
http://www.ehow.com/info_8351816_increases-uva-uvb...
They differ in their biological activity and the extent to which they can penetrate the skin. Medium-wavelength UVB is very biologically active but cannot penetrate beyond the supe...
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UV-B.
http://wiki.answers.com/Q/Is+uv-a+uv-b+or+uv-c+mor...
Not much UV gets out of an incandescent bulb. Best would be to run them right off the DC so you don't waste so much energy in the inverter (plus they're expensive).
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When sunlight penetrates the top layers of the skin, ultraviolet radiation (referred to as UVA or UVB) bombards the genetic material, the DNA, inside the skin cells and damages it....
http://www.parksidepharmacy.com.au/articles.asp?ID...
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Uva Radiation

Ultraviolet - Wikipedia, the free encyclopedia
Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range between 400 nm ...
en.wikipedia.org
UVA & UVB - SkinCancer.org
Ultraviolet radiation is composed of three wavelengths: UVA, UVB and UVC. While UVC isn't a concern for skin cancer, UVA and UVB play different roles when it ...
www.skincancer.org
UVA Radiation: A Danger Outdoors and Indoors - SkinCancer.org
UVA rays account for up to 95 percent of the UV radiation reaching the Earth's surface. Although they are less intense than UVB, UVA rays are 30 to 50 times ...
www.skincancer.org
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