Because of too much hot environment in Saudia, we cannot sit in the car, at least we have to wait for 15 mins for the normal temperature of car. due to this I applied dark black tints on rear, so family can sit easily, and by mistake also applied dark black on front, and m waiting, when the driver side tint torn almost to 25% then remove dark tints and apply very light (its almost 10% torn now :P;))....
here in Saudia, rear windows and screen is allowed for tinting either dark or light black, its your preference, but on front if you applies very light black tints means Traffic police can see you easily its allowed....