WHAT IS VLT?
Visible Light Transmission (VLT) is the percentage of light that passes through your window film and glass combined. The lower the VLT number, the darker the tint. For example, 5% VLT (often called "limo tint") blocks 95% of visible light, while 70% VLT allows 70% of light through — meaning it is much lighter and more transparent.
California measures VLT using a light meter during traffic stops. The reading is taken on the outside of the glass and measures the combined VLT of both the factory glass and the applied film. Most factory auto glass already has a slight tint (often around 75–80% VLT), so even a seemingly light film can push you below the legal threshold.
CALIFORNIA TINT LAWS BY WINDOW
California Vehicle Code § 26708 regulates window tinting. Here is exactly what is legal for each window on your vehicle:
Tint is only permitted on the top 4 inches of the windshield (commonly called an "eyebrow" or "sun strip"). This strip must be non-reflective. Full windshield tint is illegal in California except with a valid medical exemption.
Driver and passenger side windows must allow more than 70% of light to pass through. Because factory glass already blocks some light, a 70% film on top of factory-tinted glass will often measure below the legal limit. Many drivers who install 70% film still receive citations because the combined VLT falls under 70%.
The rear passenger windows (behind the driver) can be tinted to any VLT percentage. You can legally run 5% limo tint, 20%, 35%, or any shade you prefer on these windows.
The back window can also be tinted to any darkness. However, if you tint the rear windshield, California law requires dual side mirrors on both the driver and passenger sides so you can still see behind your vehicle.
ADDITIONAL RULES TO KNOW
- No red, amber, or blue tint. These colors are strictly prohibited on any vehicle window.
- Reflectivity limits. Front side windows must not be more reflective than a standard factory window. Mirror-like or chrome tints are illegal on the front sides.
- Manufacturer sticker required. The film installer must place a sticker between the film and glass on the driver-side window showing the film's VLT rating and manufacturer info.
- Out-of-state vehicles. If your car is registered in another state, California generally recognizes tint compliant with that state's laws — but you may still be stopped and questioned.
MEDICAL EXEMPTIONS
California allows medical exemptions for drivers and passengers with certain conditions that require limited sun exposure. A licensed dermatologist must complete a signed document stating that you need darker tint for a documented medical condition (such as lupus, photosensitivity, melanoma history, or other UV-sensitive conditions).
Important: You must carry the exemption documentation in your vehicle at all times. Law enforcement can still pull you over, but presenting valid paperwork will typically prevent a citation. The exemption must specify the minimum VLT required for your condition and the duration of the exemption.
WHAT HAPPENS IF YOU GET PULLED OVER?
In California, window tint violations are typically cited under Vehicle Code 26708. For a first offense, you will usually receive a "fix-it ticket" (correctable violation). This means you must remove the illegal tint, have a law enforcement officer or DMV employee sign off on the correction, and pay a small administrative fee (usually $25) plus any court fees.
Repeat offenses or refusal to correct the violation can result in fines of $100–$200 or more, plus potential points on your driving record. In Anaheim and Orange County, enforcement varies by agency — the CHP is generally stricter than local Anaheim PD, but both can and do cite tint violations during routine traffic stops.
WHY CHOOSE A PROFESSIONAL SHOP?
A professional installer understands California's VLT requirements and will measure your factory glass before recommending a film. At Top Tier Auto Tint, we use a light meter during consultation to ensure your front side windows will pass the 70% VLT requirement after installation. We also provide the required manufacturer compliance sticker and document your film specifications.
DIY tint kits or unlicensed mobile installers rarely account for factory glass tint or California sticker requirements. Saving a few dollars upfront can cost you a ticket, a removal fee, and the price of re-tinting legally. We back every install with a lifetime warranty and the peace of mind that your vehicle is road-legal.
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