It’s important to recognize that the ability to see through window film is also dependent on interior and exterior lighting. For instance, with a highly reflective or tinted film on a sunny day, occupants inside the building will be able to see out clearly, while someone outside will have difficulty seeing in. On the other hand, when it’s nighttime and the lights are on indoors, occupants of the space might have difficulty seeing outdoors because the greatest light source is now indoors. Furthermore, with the lights on, someone outside will likely be able to see inside the space at night.