•  The auto-light sensor contains upward and forward illumination sensors which detect the level of illumination above and in front of the vehicle respectively.

•  When the upward and forward illumination sensors detect the illumination level at which the headlights should be turned off, the sensors turn off the headlights at the optimal timing.

•  When the upward and forward illumination sensors detect the illumination level at which the headlights should be illuminated, the sensors illuminate the headlights at the optimal timing.