This film is opaque but lets light. His major interest is its width of 67.5 cm which covers a "standard" glass without any connection .... (this type of electrostatic film is usually sold in 45 cm). It is very easy to install: just moisten the glass and smooth out air bubbles from the center outward with a card type credit card and grip is perfect! This film has been installed on the windows of a mobile home in order to preserve the occupants from prying eyes of neighbors. It is highly appreciated as it helps keep the curtains open and enjoy the rays of the sun in peace!