Let me start with a brief introduction to the principle of led beauty instrument. The principle of LED beauty is that when the strong pulsed light of LED with a specified wavelength is irradiated on our skin, it has been confirmed by long-term medical research that it can have different effects on our skin, such as skin rejuvenation, acne and freckles. Different wavelengths of light show different colors in our eyes. Among them, blue light is at a wavelength of about 420nm, which can activate the photodynamic response of P. acnes and play a bactericidal effect. Like the original poster’s oily acne skin, it can be effectively treated as long as it meets the requirements of the parameters. However, the penetration depth of blue light is only 150 microns. Can't reach the sebaceous glands. Therefore, the treatment of acne with blue light is just to make up for it, and cannot play a preventive role.
In addition, the wavelength of red light should be around 630nm. It can promote the proliferation of collagen, so that the skin is plump and plump, so it has the effect of whitening and rejuvenating the skin and anti-aging. Moreover, the red light has a particularly strong penetrability, which can reach 550 microns, so it can also heat the epidermal capillaries and improve the skin microcirculation. The light of these wavelengths is not harmful under normal circumstances, but we have to pay attention to the large row of lights on a certain treasure with a few hundred dollars. The large row of lights always pays attention to a high-density lamp bead to play a better effect. But here I want to tell you, when I design the led beauty instrument, the most important part is of course the wavelength adjustment and the selection of the led light. The hardware cost of the entire product is also here. So you say that this large row of lights only sells for a few hundred yuan with a few hundred lamps, which is not reliable. This may be mixed with some other lights, and may have various problems such as poor wavelength stability.
