I currently have 20% tints on the sides, 5% on the rear, and 70% UV tint on the windshield of my '97 Civic. My visibility at night is more impaired now, living in a dark city in Kentucky (compared to previous Miami, FL brightness). I've really enjoyed the added UV protection from my windshield tint, both from heat reduction and less strain on my light sensitive eyes, so I'm going with UV protection all around by replacing the rear and side tints. I'll likely choose the Black Box brand over 3M (if I do it myself) due to cost and that reviews seem to state its a solid comparable quality. However, I cant definitively decide on either 35% or 50%. Please share your opinions and pictures if possible.