What is VLT or visible light transmission?

It refers to the percentage of visible light that can pass through the window film and glass. A higher VLT means the tint is lighter and lets in more light, while a lower VLT means the tint is darker. For example, a 70% VLT is fairly light and clear, while 20% VLT is much darker and offers more privacy.

VLT is also important because many regions have legal limits on how dark your window tint can be.

VLT Tint Rules for Minnesota (2026):

Front side windows: Minimum 50% VLT for all vehicles. Rear side/rear windshield: Sedans: Minimum 50% VLT.

SUVs, vans, and trucks: No minimum VLT; darker tint allowed.

Windshield: Only a non-reflective strip above the AS‑1 line; the main glass cannot be tinted.

So, for most passenger vehicles in Minnesota, a legal tint would be a film with 50% VLT or higher on the front and rear side windows. If you have a medical condition that requires a darker tint, Minnesota allows medical exemptions with proper documentation, which must be carried in the vehicle.

How to choose your desired VLT:

Privacy: Lower VLT = more privacy; higher VLT = more visibility.

Heat & UV protection: Even lighter tints can block heat if they have high IR rejection.

Night driving: Don’t make front windows too dark; it can reduce visibility.

Style: Darker tints look sleek; lighter tints are subtle.

(Optional) Legality: Stay at or above your state’s minimum VLT.