[Rockett]

What are the laws in your state concerning how dark your window tint can be? And are there any states that allow mirror film? I'm just curious.

[jason]

HOW DARK CAN WINDOW TINT BE IN FLORIDA?

Darkness of tint is measured by Visible Light Transmission percentage (VLT%). In Florida, this percentage refers to percentage of visible light allowed in through the combination of film and the window.

Windshield Non-reflective tint is allowed along the top of the windshield above the manufacturer's AS-1 line.
Front Side Windows Must allow more than 28% of light in.
Back Side Windows Must allow more than 15% of light in.
Rear Window Must allow more than 15% of light in.

HOW REFLECTIVE CAN THE TINT BE IN FLORIDA?

Similar to sunglass lenses, some tinting film contain metallic elements that help in reflecting incoming light and reducing the glare and heat generated by visible light.

Front Side Windows Must not be more than 25% reflective.
Back Side Windows Must not be more than 25% reflective.

OTHER FLORIDA RULES AND REGULATIONS

Restricted Colors No colors of tint are explicitly banned.
Side Mirrors Dual side mirrors are required if back window is tinted.
Certificate Requirements Manufacturers of film do NOT need to certify the film they sell in the state.
Sticker Requirements The sticker to identify legal tinting is required on the inside of the driver’s side doorjamb.
Medical Exemption State allows medical exemptions for special tint. For more details about the specific terms of the exemption, consult your state law.

I had to cheat and use this site to find out the laws.
http://www.tintcenter.com/laws/

[tuner]

Gah, ours must allow more than 20% of the light in all the way around the car. Most locals had gotten in the habit of using 5% tint by the time that law was in effect, so the government made quite a penny with those tickets!

[JeepersCreepers]

The Michigan law states: " The use of tinting is limited to the rear side windows, the rear window if the vehicle has outside mirrors on both sides, and the top 4 inches of the front side windows." Basically you might as well not have any. There are exceptions for medical reasons but you must have the letter from your doctor handy at all times.

[lauren]

I know very well in some of the places around my area they do break the law but I have yet to hear anyone be pulled over or fined for it. I guess it does not happen (the getting caught part) as much as most would imagine.