The answer is yes but it’s more of a challenge than with UVB Broadband. One of the best features of UVB Narrow Band is that it has an excellent “therapeutic” effect with less risk of a sunburn. How can that be? The answer is quite simple. Our skin is sensitive to all forms of ultraviolet light and from a sunburn viewpoint, our skin is most sensitive to UV light between about 290 nm (nano meters) and 305 nm. Take a look at the graph below.
Clinical studies have shown that the peak therapeutic effectiveness of UVB to be between 295 to 313 nm and that wavelengths below (shorter) than roughly 300 nm are more likely to cause a strong erythemal response or severe burning. UVB Narrow Band is in the 311-313 nm range and causes less burning than shorter wavelengths.
The area under the blue curve is UVB BB (Broadband) and as one can see, a significant amount of the energy of UVB BB is inside the area of the curve defining our skin’s tendency to burn.
UVB NB is not totally foolproof but one does have to work harder to get a sunburn!
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