Diffuses light evenly throughout when lights are on and eliminates the need for a building interior. It blocks the outside view through the windows of an empty building, while still allowing light to shine through the windows from the inside. Use the optional Window Tint together with Diffusing Film to make windows appear dark when lights are off. Material is easy to apply and Tint and Film will each cover approximately 216 square inches (13.9 sq dm) of window space.