Originally Posted by Modshack

What's the point?

HOW DARK CAN WINDOW TINT BE IN NEW YORK?
Darkness of tint is measured by Visible Light Transmission percentage (VLT%). In New York, this percentage refers to percentage of visible light allowed in through the combination of film and the window.
• Windshield Non-reflective tint is allowed on the top 6 inches of the windshield.
• Front Side Windows Must allow more than 70% of light in.
• Back Side Windows Must allow more than 70% of light in.
• Rear Window Any darkness can be used.

It's a light transmission number which includes the factory tint (yeah we have some)

Even a 25% tint film could be illegal when combined with the factory tint (which is usually around 10%)

YOu can even see it, though it's light like most factory tints: