A lighted exterior rearview mirror system of a vehicle includes an exterior rearview mirror assembly and a light module disposed at the exterior rearview mirror assembly. The light module includes a plurality of illumination sources operable to emit light. The illumination sources are individually controlled responsive to said the input to provide a customized illumination beam emanating from the exterior rearview mirror assembly. The system may include a control that is responsive to the user input to selectively individually energize the light emitting diodes, and the control may individually adjust a duty cycle of each of the light emitting diodes responsive to the user input. The light module may include a ground illumination light source, a backup light source and a turn signal indicator.