NOVELTY - A transparent anti-reflective structured film (F1) comprises structured film substrate containing structured face having anti-reflective structures and is anti-reflective to light, where anti-reflective structures comprising cross-linked silicone elastomeric material, each anti-reflective structure having structured surface which having silicone elastomer cross-link density that is higher than a remainder of the anti-reflective structured film.    USE - As transparent anti-reflective structured film useful for light energy absorbing device (claimed).    ADVANTAGE - The film exhibits at least one of change in light transmission of less than 8%, after the structured surface is exposed to the dirt pick-up test or a change in light transmission of less than 8%, after the structured surface is exposed to the falling sand test; and improves the efficiency (i.e. increases the energy generating potential) of solar and other light energy absorbing technologies by enabling more useful light energy into the corresponding light absorbing element (e.g. photovoltaic cell).    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) light energy absorbing device comprising light absorber having light energy receiving face, and transparent anti-reflective structured film (F1), disposed so as to be between a source of light energy and the light energy receiving face, while light energy from the source is absorbed by the light absorber;    (2) making transparent anti-reflective structured film involving providing structured film substrate comprising structured face having anti-reflective structures having structured surface, with the structured face is anti-reflective to light, and the structured film substrate comprising cross-linked silicone elastomeric material, and treating the structured surface such that the structured surface has higher silicone elastomer cross-link density than the remainder of the structured film substrate; and    (3) making light energy absorbing device involving providing transparent anti-reflective structured film (F1), providing light absorber having light receiving face, and securing the anti-reflective structured film in relation to the light absorber so that light pass through the anti-reflective structured film to the light receiving face of the light absorber.