This comprehensive guide breaks down the specific skin benefits of 8 key wavelengths used in LED face masks, including blue (415nm, 470nm), green (525nm), yellow (590nm), amber (605nm), red (630nm), and near‑infrared (850nm, 1072nm). Learn which lights treat active acne, stimulate collagen, soothe rosacea, fade dark spots, and promote deep tissue repair for healthier, younger‑looking skin.