The laser beams, or in case IPL case, light waves, work by energy from light waves being absorbed by the dark pigment in the skin( your hair). When that energy hits the dark pigment ( known in the biz as a chromophore), its then converted to heat which causes damage to the hair follicle. because hair grows in cycles and is easily influenced by hormonal changes, 8-12 treatments are normally recommended. Every client and every hair is different. 

Buy 5 Treatments , Get TWO treatments FREE!