Talk about your lowest-light conditions
Describe the places where you drive and park after dark. Ask to compare film samples and explain any visibility concerns you already have. A dramatic nighttime image cannot show how a particular shade will feel from inside your vehicle.
Separate darkness from film performance
Visible light transmission describes how much visible light passes through a film or glazing system. Lower VLT means a darker appearance. Heat-related performance should be compared using the actual film specifications, rather than assuming the darkest option is the best match.
Confirm the plan window by window
Your vehicle’s existing glass and the requirements that apply to each window need to be considered. Ask which film line is proposed, what shade is being quoted, and how the finished combination will be evaluated. Request the product-specific warranty and care instructions.