better night license plates for cars

Reading license plates of cars at night is very hard, even when there is small light bulb illuminating it. How about having license plates with back light? The plate background would be black metal, and there will be white translucent numbers identifying the car. At day time, the number will be visible as normal, but at night, the back light will filter through translucent material, making it easier to read.

Another idea would be to have programmable license plate built into the car, which the Department of Motor Vehicle only programs, and otherwise the plate functions same as above.