How do the VLT numbers work? If you see a number of a VLT of 20% it means that it blocks 80% of the visible light coming through the tint. The more visible light(VLT), the more energy you are allowing into the car which will affect temperature, glare, and comfort levels. So it would be very wise to look at the laws in your state as it pertains to how much visible light must be allowed through the tint to be legal. Some states require more VLT and some less, some will allow different VLT's for different windows. Most states have laws that require a certain VLT and they will also tell you what it must be for each of the windows in your car. In a nutshell they refer to the visible light transmission through the tint into the car as VLT. The two big areas with the biggest portions of the spectrum and possible gains are in the Visible Light and in the IR bands. So the playing field in the UV spectrum is all pretty close in the tints. ![]() Most window tints that I ran across were blocking or rejecting 98+% of UV light. Most car manufacturers already provide some level of UV protection on the glass, but not as high as what you will find with these window tints. Each of these areas have to be addressed if we want to have a chance to control the heat and comfort levels in the car. In each area of the spectrum listed above we have different frequencies of energy and the objective of the automotive window tint is to reflect/reject or absorb the energy so that it does not make it into the cabin of your car. Near Infrared Light(IR) This is the spectrum that produces the heat that you feel on your skin Ultra Violet Light ( the stuff they tell us to avoid for skin damage and damage to the things it hits)ģ. The light spectrum as it pertains to window tint and the energy we are trying to redirect and manage:Ģ. There is a fair amount of controversy in the window tinting industry over some of the hot buzz words and marketing methods used which can make for quite a confusing process when it comes to understanding window tint and the performance of those tints. When I started digging into this a few weeks ago I knew going into it that there is some very interesting science going on in window tints and window coverings, but I really didn't know just how convoluted and complex this topic would become. But I wanted to touch on some reasons that you might consider tinting your windows beyond appearance and some of the things you should look for. Some like the appearance of tinted windows, some don't. Window tint isn't just an appearance thing for a car. There are several ways to approach that topic, but in this post I want to talk about window tint. They have lost this customer for life.Well after doing some reading here on the forum it becomes more and more clear that one of the things that may be able to help the Leaf is to control the interior temps in the car. There are better tint shops in the bay area, pass on them. After spending this much money and have two cars done there, I would pass on this place because you don't get premium support/coverage for a premium product. They decide if they are going to replace the tint without regard to your travel time or personal time for their check. Basically, you as the customer aren't right. They want to see the issue first (read = you wait 3 weeks) before they honor any warranty. I scheduled an appointment to get it redone with a 3 week wait time on scheduling, I get there to find out there were no installers onsite. I had a major issue with the tint, white heat blotches which were painfully obvious. They make you jump through hoops to get replacement if there is an issue with the install. The challenge is the installer in the Bay Area (Fremont), they don't stand by their products. ![]() ![]() Nobody with spectra photosync experience ?I have this tint and I love the film.
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