Solar energy reaching your Tesla arrives as visible light, ultraviolet and infrared, and infrared is the invisible part many drivers notice most as heat building in a parked car. Kepler's nano-ceramic IR and IR+ films are built to address solar heat at the glass, which is why performance isn't tied to how dark the film looks. Visible light transmission tells you how much light passes through; it is a separate measure from solar heat performance, so compare the exact film and shade rather than assuming darker is cooler. Your installer can walk you through how each shade behaves on your model's glazing.
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