Solar energy reaching your Tesla arrives as visible light, ultraviolet and infrared. Nano-ceramic film is designed to work across that spectrum rather than simply darkening the glass, which is why visible light transmission on its own does not tell you how a film will perform on heat. The practical result for most owners is a cabin that heats up less in the sun, less glare through large glass areas and reduced ultraviolet exposure for the interior. Because the two measurements are separate, compare the exact film and shade side by side instead of assuming the darkest option is the strongest performer, and ask your installer how each option behaves on the glazing already fitted to your car.
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