LIGHTING FILM, AND INSTALLATION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a lighting film that allows for easy and correct identification of pasting direction, and to provide an installation method therefor.SOLUTION: A lighting film 1 changes a propagation direction of incident light before the light exits the film 1, and includes a light control layer 7 comprising: a base section 3 having a plurality of grooves formed and arranged spaced apart from each other along one surface thereof; and a plurality of louver sections 4 having a refractive index different from that of the base section 3 and occupying the plurality of grooves. At least some of the plurality of louver sections have first surfaces and second surfaces arranged while continuing a one side surface, the first surface and second surface being differently shaped. The lighting film 1 has markers for identifying an exit direction of light.