The main difference between IPL and laser is the type of light used. IPL or intense pulsed light, is a broadband pulsed light, whereas laser is a single monochromatic light source. IPL and laser technologies both target the melanin in the hair follicle and you can expect permanent results from both. 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.