What is the qualified light transmittance for car window film?
2 Answers
Car window film with a light transmittance of 70% or higher is considered qualified. The standard requires that the lower the light transmittance of the original car glass, the higher the light transmittance of the selected sun film should be. Car window film is a thin film applied to the front and rear windshields, side windows, and sunroof of a vehicle. Benefits of car window film: 1. Blocks a significant amount of heat generated by infrared rays; 2. Filters out ultraviolet rays, reducing the aging of car interiors; 3. Prevents injuries to passengers caused by accidental glass breakage; 4. Maintains privacy and safety; 5. Reduces air conditioning load and saves fuel; 6. Minimizes accidents caused by glare.
As an experienced driver who pays close attention to automotive safety, I believe the light transmittance of window films is an issue that cannot be overlooked. The front windshield must have a light transmittance of at least 70% to meet safety standards – this requirement is based on driving safety. If it's lower than this, you'll struggle to see road conditions clearly during night driving or rainy weather, increasing the risk of accidents. Side and rear windows can have lower transmittance, typically 20-40%, which is legal in many regions and balances privacy with sun protection. When selecting films, I always prioritize reputable brands and check labels to ensure light transmittance compliance, because while dark films may look cool, police enforce these regulations strictly. Additionally, the film material affects its lifespan – high-quality films maintain good light transmission while blocking UV rays. Remember: safety first – don't compromise safety for fleeting trends.
