The IPL uses filtered intense pulsed light to either target fine blood vessels or sun spots. Facial treatments take 5 minutes and are typically repeated monthly until your complexion is clear. They work best on very pale skin as the light tries to burn away anything dark. If your skin is extremely pale, then 1-3 strong treatments that make the skin peel only where you either have a lot of fine blood vessels or sunspots as that is the only area that takes up the IPL energy. If you have hair in the area it will also try to kill the dark hairs.