The key difference between laser and IPL is the type of light. IPL (Intense Pulsed Light) is a broadband pulsed light source, whereas laser is a monochromatic coherent light source. Both methods target the melanin in the hair follicle and permanent results can be expected from both. Professional laser treatment is working more selective and therefore the very high energy will focus on the hair follicle rather than surrounding skin. Therefore Professional laser will lead to fast results as well as being suitable to darker skin tones. Energy, frequency and hair colour are all determining factors in the efficacy of the treatment, while the light source, whether it is a laser or an intense pulsed flash light plays a minor role.