Sentences with phrase «uvb radiation emitted»

Not exact matches

The UV LED device also emits a much narrower band of UVB light and thereby decreasing likelihood of skin damage that can occur when the skin is exposed to higher wavelengths of UV radiation.

It has been suggested by some vitamin D researchers, for example, that approximately 5 — 30 minutes of sun exposure between 10 AM and 3 PM at least twice a week to the face, arms, legs, or back without sunscreen usually lead to sufficient vitamin D synthesis and that the moderate use of commercial tanning beds that emit 2 % — 6 % UVB radiation is also effective [6,20].