... of light, delivered through Light Emitting Diodes (LEDs), to cause bio-stimulation on cell receptors. Bio-Light therapy ... decreases inflammation, and improves cellular metabolism and protein synthesis (collagen). What are the benefits of PDT LED BIO-LIGHT MACHINE SPL machine ?Treatments ... . For any skin type, no side effects;7. Easy to use, no need of professional operator;8. Comfortable,non-invasive ...