The thing about laser is it targets pigment in the skin along with the follicles. You can still do the treatments, but you will have to reduce the power of the laser depending on how dark the skin is. Like others have said when working outside look for ways to reduce the sun's effect on your skin. SPF, hats, and various other clothing articles are designed to reduce sun exposure. Other than that, it is always worth looking into a consult for laser to help you determine the effect you will likely have with your level of sun exposure. Good luck in your quest for laser treatment!