Solar energy reaching your Tesla includes visible light, ultraviolet and infrared, and infrared is the part you feel as heat without seeing it. Kepler's IR and IR+ nano-ceramic films are made to address solar heat and glare through vehicle glazing, which is why they are offered in light shades as well as dark ones. Visible light transmission tells you how the glass will look; it does not describe the solar heat performance, so the two should be compared separately for the exact film and shade. Ask your installer to go through the specification for the option you prefer, on the glazing your model and year actually has.
Did you know Kepler film is also used on Irvine homes through residential window tinting solutions