An exterior mirror system for a vehicle includes an exterior mirror assembly having a folding portion and a non-folding portion configured for mounting at a side of a vehicle. A reflective element is disposed at the folding portion. The reflective element is mounted to a backing plate that is supported by an electrical actuator operable to move the reflective element. The exterior mirror assembly includes an indicator having at least one light emitting diode that emits an intensity of light when electrically operated. During low ambient lighting conditions at night, the intensity of light emitted by the at least one light emitting diode of the indicator is reduced under photosensor control to a nighttime intensity level. The nighttime intensity level is greater than about 0.3 candela and is less than about 200 candelas. The indicator may include a module and the module may be substantially water impervious.