Dark tinted glass keeps the interior cool by absorbing solar energy and at the same time offers privacy for passengers in the back of the car (dark tinted glass is not permitted for the driver and forward-passenger windows, or of course for the windscreen). Dark tinted glass is available in several colours and each colour in several shades from lighter to very dark. The values shown are percentages of light transmission.
Switchable glazing, which responds to varying electrical conditions with correspondingly different colour properties, allows for the creation of a "customized" interior ambience. Via a simple dial, a driver or passengers can control the amount of light entering the vehicle - blocking anywhere from 4% to 40%. Heat from sunlight can be reduced by anywhere from 2% to 20%. One can select a lighter tint on cloudy days, and then darken it when the sun reappears, or simply change the lighting to suit one's mood or create an appearance appropriate for the occasion.