We have found intense pulsed light sources to be useful in treating Fitzpatrick I and IV skin phe-notypes (Figs. 4.21-4.24). Although some IPL sources are FDA cleared in the USA for Fitzpatrick skin phenotypes V, we have found that the incidence of postinflammatory changes may be too high for practical use in some of these individuals. In choosing emitted pulse durations, we have noted that shorter pulse durations are more helpful for finer hairs, while longer pulse durations appear to have greater efficacy in treating thicker hairs. In addition, longer pulse durations, because of their epidermal pigment sparing capacity, are chosen for darker skin phe-notypes. The choice of pulsing mode and inter-
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