Are There Any Unexpected Consquences of Using Window Film?

Under certain conditions, window film will exhibit iridescence. This phenomenon usually occurs at night, when the source of illumination within a building is fluorescent lighting.

The amount of iridescence may vary from almost imperceptible, to very visible and most frequently occurs when the film is constructed using one or more layers of sputtered metal. It can however occur in non-reflective films as well.

When iridescence does occur in window film, the only way to stop it is to prevent the fluorescent light from illuminating the film.