Unused LED beauty device facial mask light, 7-color light source, face mask light with eye mask The effects of LED light on the skin vary depending on the color of the light. Red LED promotes collagen production, improving skin elasticity and firmness, while blue LED has the effect of killing acne-causing bacteria. In addition, yellow and green LEDs are effective against dullness and spots, and near-infrared light acts on the deep dermis, promoting wound healing and blood circulation, addressing various skin concerns. LED treatment promotes natural skin improvement without damaging the skin and is widely used, from home beauty devices to professional treatments in clinics.