Near-infrared light is, on the contrary, widely used in LED technologies to combat skin aging. But it is very important to always verify the precision of the LEDs used. Our LED mask uses red light at 633 nm and near-infrared at 830 nm with high precision of +/- 2 nanometers per LED. These are the most precise LEDs with the most accurate light spectrum possible. Their precision makes them more effective while guaranteeing you a spectrum far from harmful rays. The two wavelengths we have selected have a clinically proven action with numerous scientific studies on the subject. You can read some of these in the "efficacy" section of the product page on our website. The two lights work in synergy: combined, the results on the skin are even better. Infrared rays penetrate deeper into the skin, reaching the hypodermis, allowing actions such as reducing wrinkles, improving firmness, fighting blemishes and scars, and providing a radiance boost.