IPL stands for intense pulsed light. IPL treatment is often referred to as photon rejuvenation, or Photofacial, because it uses “selective photothermal decomposition” during treatment. Photothermal decomposition is the process by which an IPL laser converts light energy into heat energy and processes unwanted hair and skin pigments without damaging the skin surface. IPL treatment is non-invasive and requires no downtime.