LED light therapy facial. Are you choosing the right light for your skin? Aging — "Red light": for wounded, sagging skin with fine lines, red light is typically used. Thanks to its powerful repair ability, red light stops exudate on wound surfaces, boosts cell vitality, speeds cell renewal, and repairs damaged cells and wounds. It also calms inflammation to relieve pain. Acne — "Red + blue light": acne involves inflammation, bacteria and skin damage, so combined red-blue light is used. Red light calms inflammation while speeding acne healing and reducing acne scarring; blue light kills and inhibits bacterial growth, reduces inflammation, and reacts with photosensitizer to sterilize.