The Alexandrite laser made by Candela. It works best on those with light skin and dark hair (the energy that gets focused is on a primary target which is the hair shaft). If the patient has dark skin, diode lasers can be used. We can also use an Alexandrite laser at lower energies. No matter what laser is used, the darker the skin, the harder it is to treat. The same holds true for light hair which is hard to treat because there is just no target.