Lighting film, web roll for lighting film, window pane, roll screen, and lighting louver

A web roll for a lighting film which is obtained by winding a long lighting film, the lighting film comprising:

• a base member which has light-transmitting properties;
• a plurality of protrusion portions which have light-transmitting properties and are formed on one surface of the base member so as to be adjacent to each other;
• and
• a gap portion which is formed between the plurality of protrusion portions,
• wherein in a protrusion portion of the plurality of protrusion portions, a first end surface on the base member side or a second end surface on an opposite side to the base member is configured as a light incidence end surface, and a side surface which comes into contact with the gap portion is configured as a reflective surface for totally reflecting light which is incident from the light incidence end surface,
• the base member or a member that is formed on one surface of the base member and has light-transmitting properties is exposed in the gap portion, and
• the plurality of protrusion portions are formed in each of a plurality of tiling areas, the plurality of tiling areas being adjacent to each other.

A window pane comprising:

• a glass substrate;
• a plurality of protrusion portions which have light-transmitting properties and are formed on one surface of the glass substrate so as to be adjacent to each other;
• and
• a gap portion which is formed between the plurality of protrusion portions,
• wherein, in a protrusion portion of the plurality of protrusion portions, a first end surface on the glass substrate side or a second end surface on an opposite side to the glass substrate is configured as a light incidence end surface, and a side surface which comes into contact with the gap portion is configured as a reflective surface for totally reflecting light which is incident from the light incidence end surface,
• the glass substrate or a member that is formed on one surface of the glass substrate and has light-transmitting properties is exposed in the gap portion, and
• the plurality of protrusion portions are formed in each of a plurality of tiling areas, the plurality of tiling areas being adjacent to each other.