The darkness of automotive window film affects how much light enters the cabin and how easily others can see inside. For Durham drivers, choosing the right shade means balancing privacy, visibility, appearance, nighttime driving, and North Carolina regulations.  What Tint Darkness Actually Means Window film darkness is commonly described by visible light transmission (VLT), which is the percentage of visible light passing through the glass. A higher VLT percentage means a lighter film, while a lower percentage indicates a darker appearance. The installation process can also influence the final result. Drivers who are unfamiliar with professional film installation may wonder: Do Window Tinting Installers Cut Film Directly On The Outside…