An apparatus includes an illumination source including a first illumination source segment and a second illumination source segment. The apparatus also includes driver circuitry coupled to the illumination source, the driver circuitry including a first driver coupled to the first illumination source segment, the first driver configured to produce a first drive signal to instruct the first illumination source segment to produce a first light having a first illumination intensity. The driver circuitry also includes a second driver coupled to the second illumination source segment, the second driver configured to produce a second drive signal to instruct the second illumination source segment to produce a second light having a second illumination intensity.