What's the difference between Medical 308 and Peninsula Whitening Elf?

It makes no difference. I used to shoot 308 in the hospital, but it's really too much trouble to go to the hospital three times a week. It's hard to stick to it, but it will affect the effect if you don't stick to it. Later, I began to use the Peninsula Whitening Elf, which is also medical grade. It can emit a stable light source with a wavelength of 308nm that meets the national detection standards, and the intensity is as high as 30 MW/cm ㎡. The key is that it is very convenient to use, anytime, anywhere, and there is no need to rush to the hospital to queue up. Infinitely friendly to office workers like me. Now I insist on taking pictures two or three times a week. I went to the hospital to get medicine last week and took a photo of the wooden lamp. It can be seen that the white spot has obviously improved.