Not sure how your street lighting is, but have you tried setting the camera to day-mode during the night? You may be surprised by the image quality when you have a street light right there.
Also, the IR reflecting off of your license plate and the street light itself may cause the rest of the image to be a bit darker than usual. Can you try aiming it down a bit and park a bit more to the back so both your license plate and the street light aren't in the picture?
Also, the IR reflecting off of your license plate and the street light itself may cause the rest of the image to be a bit darker than usual. Can you try aiming it down a bit and park a bit more to the back so both your license plate and the street light aren't in the picture?