311 wavelength does not take the place of 365 wavelength, the reason:
(1) 311 belongs to uvb rays (275-325), 365 belong to uva rays(325-400). It is generally believed to promote skin pigmentation being uva rays. I know a Beijing hospital with uvb rays ( I forgot specific wavelength) in the treatment of vitiligo, erythema reaction obviously but curative effect is not good.
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