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1. A LIGHTING PANEL COMPRISING A TRANSPARENT PRISMATIC PLATE WITH ONE PRISMATIC SURFACE AND AN OPPOSITE SMOOTH PLANAR SURFACE AND A DIFFUSION FILM OVERLYING SAID PLANAR SURFACE, BONDED THERETO IN SPACED BONDED AREAS AND SPACED THEREFROM INTERMEDIATE SAID BOUNDED AREAS, SAID BONDED AREAS CONSTITUTING A MINOR PART OF THE TOTAL AREA OF THE PLATE OVERLAIN BY SAID FILM.
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1. A LIGHTING PANEL COMPRISING A TRANSPARENT PRISMATIC PLATE WITH ONE PRISMATIC SURFACE AND AN OPPOSITE SMOOTH PLANAR SURFACE AND A DIFFUSION FILM OVERLYING SAID PLANAR SURFACE, BONDED THERETO IN SPACED BONDED AREAS AND SPACED THEREFROM INTERMEDIATE SAID BOUNDED AREAS, SAID BONDED AREAS CONSTITUTING A MINOR PART OF THE TOTAL AREA OF THE PLATE OVERLAIN BY SAID FILM.
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