NOVELTY - A photovoltaic module (1) comprises reflective backsheet having multilayer optical film having optical stack comprising alternating first/second optical layers with different indices of refraction and having a left band edge in a range of 600-900 nanometers; and photovoltaic cells (4) overlying the reflective backsheet, where the photovoltaic cells are spaced apart from each other such that open areas (5) of reflective backsheet are not covered by the photovoltaic cells.    USE - As photovoltaic module comprising photovoltaic cell such as crystalline silicon single junction cell, ribbon silicon cell, copper indium gallium selenide cell, or gallium arsenide cell (claimed), for day lighting inside a building or structure. The photovoltaic module is formed as an architectural article e.g. a window, a skylight, a covering or partial covering such as a roof or an awning, an atrium, a door or it can be integrated into a building or other structure e.g. a roof on a building, parking lot, or carport.    ADVANTAGE - The photovoltaic module is transmissive to visible light, when the architectural article is installed as part of a building or structure, the photovoltaic module allows visible light to enter into the building or structure (that is, it allows day lighting). The reflective backsheet or reflective film provides a useful alternative to white backsheets, which are disfavored in some applications because they are considered to detract from the aesthetic appeal of a building where they are used. Because the multilayer optical film useful for making the reflective backsheet or reflective film has a left band edge in a range from 600 to 900 nanometers, the resulting photovoltaic module have reduced glare in comparison to conventional backsheets such as black or white backsheets not provided with the multilayer optical film.    DETAILED DESCRIPTION - A photovoltaic module (1) comprises reflective backsheet comprising multilayer optical film having optical stack comprising alternating first/second optical layers with different indices of refraction and having a left band edge in a range of 600-900 nm; and photovoltaic cells (4) overlying the reflective backsheet, where the photovoltaic cells are spaced apart from each other such that open areas (5) of reflective backsheet are not covered by the photovoltaic cells, where the photovoltaic cells have an absorption bandwidth, and the multilayer optical film reflects at least a portion of light in a range of wavelengths that corresponds with absorption bandwidth of the photovoltaic cell.    DESCRIPTION OF DRAWING(S) - The figure shows a plan view of photovoltaic module.    Photovoltaic module (1)    Photovoltaic cells (4)    Open areas (5)    Front cover (10)    Surrounding frame (16)