Collagen phototherapy LED (light emitting diode) is a non-invasive skin care procedure that stimulates collagen and heals and repairs tissues. At Malone Facial Plastic Surgery in La Jolla phototherapy LED uses diodes to dispatch low-level light energy into the deeper layers of the skin. As developed by NASA, there are two LED treatments: The red light LED triggers cellular stimulus that produces collagen resulting in plumper looking skin, reduces wrinkles and fine lines and treat other issues such as sun damage. The blue light LED destroys the bacteria that create acne beneath the surface of the skin.