Ambient Light Sensor Extender Accessory Peerless-AV’s Ambient Light Sensor (ALS) Extender automatically adjusts the brightness of the display/TV based on ambient lighting conditions. The ALS Extender overrides the built-in ambient light sensor, when it is connected, allowing flexibility for installations where the built-in ALS may have shadows being cast on it by surrounding structures or vegetation. The ALS Extender can be placed in a location that is more representative of the actual ambient light conditions.