Yes, this feature is available on the high end model, the sensor you have mention is a photo-resistor, which changes the resistance value depending on the light level. Aside from the auto on / off of headlight/taillight, when the DRL/headlight is manually on, the sensor senses the surround light level and dim the dashboard/ instrument light according to your setting. At bright daylight, brightness set to maximum, when getting dark, example enter tunnel or cover parking, the dashboard/ instrument light will automatic dim to the level you have set before, upon exit the tunnel, brightness automatically back to full.





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At most, add a relay lang. TIA. 
