A Quick Guide to Visible Light Transmission

car window tint

If you plan to buy window tint for your home or car, it’s important to know more about VLT or visible light transmission. You might think that this is not something to concern yourself with, but if you are concerned about your energy bill, then this is worth a read:

What  Exactly Is VLT?

Visible light transmission or VLT is an indicator of how much of the light that hits your window is permitted to enter your home or car. Typically, the lower the percentage, the greater the level of heat protection you will enjoy. In other words, windows with a lower VLT would block more of the harmful UVB and UVC light rays.

Window tinting companies would typically quote their VLT when installing your new car window tint or home window tint.

Why Should I Adjust My VLT?

As mentioned above, car owners or homeowners who want to install window tinting on their car or home should be careful about the level of VLT that they want to install. The level of VLT is dependent on your window tint requirements.

For instance, if you live in an area where it gets very hot, then you would need a car or a home that is heavily tinted. It would prevent uncomfortable levels of heat from entering your home or car. Not only that, but you can also prevent damage to your expensive items, such as your leather furniture or your car’s leather seats. Not to mention your skin too!

As for people who live in colder regions, you do not need as much VLT as those living in warmer regions. Of course, you may still want to install some window tinting on your car or home, but you do not need as much of it. As a result, your energy bill would be a lot lower.

That said, you should always check regulations about car window tints where you live to ensure that you won’t be breaking any of them when you get window tints installed.

What Happens If There’s Too Much Light?

The more light that comes into your car or your home, the more heat is generated. If you live in an area where there are lots of sunny days, then you may want to install a window tint with a higher VLT. Otherwise, you may have to deal with a lot of problems:

  • Higher Electricity Bills
  • Longer Heating Time
  • Furniture Damage
  • Uncomfortable Home or Car

How Do I Know the Right VLT Value for My Space?

The answer to this question would depend on your location and the weather conditions you have to deal with in your area. This would also depend on the level of privacy that you need when you are in your car or your home.

A general rule of thumb would be to have your home or your car tinted somewhere between 25% to 75%. A lower VLT would be more appropriate if you wanted to enjoy more privacy in your car or home. On the other hand, a higher VLT would provide you with more protection from UVA and UVB rays.


As you can see,  when you’re about to buy window tints for your home or car, choosing the right VLT can have a big impact on the comfort of your home or car and on your energy bill. If you’re planning to get window tinting installed, then make sure that you consider how much protection you need.

Remember that the lower the VLT, the more heat protection. Also, consider the VLT of your car or the VLT of your home in the UK. It will come down to your personal preference and your location.

Premier Film Distribution is one of the most trusted glass film distributors in Australia, ensuring the highest quality you can find in window tints. So before you call an installer, make sure that they get their window tints from Premier Film Distribution! Find out more about our window tint solutions today!