Yongkang ultraviolet light therapy instrument and Kono ultraviolet light therapy instrument which is good

Ultraviolet light therapy instrument spectrum is part of the electromagnetic wave, ultraviolet wavelength range is 100-400nm, the human eye is invisible, which is divided into three bands, long-wave (UVA) in the wave (UVB) and short-wave (UVC). In the ultraviolet light uvb is also known as skin erythema area, its wavelength is just in the DNA, protein absorption bee near, can cause DNA and protein damage, is the ultraviolet light in the most active band, can be used alone for the treatment of vitiligo, so you say that the Kono kn4000 model of ultraviolet phototherapy instrument is available for treatment, rest assured.