Frequently Asked Questions How does hair removal with Philips Lumea IPL work? Philips Lumea IPL (Intense Pulsed Light) technology works by heating up the pigment (melanin) in the hair and hair root underneath the skin. This stimulates the hair to go into a resting phase. The hair then sheds naturally, leaving your skin silky-smooth. Since not all the hairs are in the same phase, it takes several treatments before all hairs are triggered to go into this resting phase. Repeated regularly, the resting phase lasts longer and hairs will not grow back.