That’s good info it have. I have 15% tint on my front and stock on the back the front is way to dark just like I told the tint guy who was putting it on saying that it will mach. He didn’t have any idea what he was talking about. I thank it is 25% net to 23% film and thats on LLumer film. And plane glass has about 3% light resistance it’s self. To get it right there are a lot of variables stock glass resistance, the film, how the machine that made the film was calibrated for that role… to get it close 35% LLumer tint should mathematically be close but you also have to take in consideration that right beside the front doors there is the windshield that is letting in a ton of light and that is going to make the front door glass look lighter than it really is. For visual preference 20% tint on 3% glass with the windshield right there it should look very visually close if not about 2% off.