I thought 40% was the darkest you could go in the Crystalline product? I went with 40%. I felt that this looked nice in the daylight but didn't impact nightime vision at all. 3M also makes a 90% Crystalline but 70% is basically clear. Its hard to tell the difference between 70% and no tint at all. I've seen several cars with the 70% on the windshield and it was tough to spot.
Last edited by vibui; 12-04-2012 at 12:23 PM.