Solar energy reaching your Tesla arrives as visible light, ultraviolet and infrared. Infrared is the part you feel as heat without seeing it, and it is the reason a car can feel oppressive through glass that looks perfectly clear. Kepler's nano-ceramic films use ceramic particles to address that infrared energy alongside visible light and ultraviolet, so the cabin gains less heat while the view out stays neutral and true to color. Because the work is done by the film's construction rather than by darkness alone, a lighter shade in the IR or IR+ range remains a genuine option for owners who do not want dark glass. The trade-off between look and performance still varies between films, so compare the data for the exact film and shade you are considering, and ask your installer how each one behaves on the glazing fitted to your model.