A vehicular cabin monitoring system includes a mirror head adjustably attached at a mounting structure configured to attach at an interior portion of a vehicle. The mirror head accommodates a camera and a plurality of light emitting diodes (LEDs) connected in series with each other. A switch is operable in an open state, where current provided by a current driver passes through each individual LED of the plurality of LEDs, and a closed state, where current provided by the current driver passes through a first subset of LEDs of the plurality of LEDs and bypasses a second subset of LEDs of the plurality of LEDs. The switch operates in the open state when the camera captures image data for a first vehicular function, such as occupant monitoring, and operates in the closed state when the camera captures image data for a second vehicular function, such as driver monitoring.