Did you know your local law enforcement is equip with a special meter that can measure the darkness of your window tint? The laws vary state-to-state as to what percent darkness you are allowed or not allowed to have on your vehicle. For us Arizonians, it is required to have minimum of 33% light transmission on the front two windows. The rear glass can be as dark as you prefer. Our friends over at Rayno Window Film put together a flow chart showing the laws nationwide across each state. Take a look by clicking here