(EP847599-A1)      The collector (10) includes a polymeric matrix containing a dye and hindered amine light stabiliser. The matrix is made of polycarbonate which is transparent and exhibits good optical properties. The dye used is from the thioxanthone, perylene inide and thioindigoid classes of compounds. One or more conventional colorants may be used.    Preferable 2,2,6,6 tetramethyl piperdine compounds are employed as the hindered amine light stabilisers due to their availability. The sunlight is absorbed in the collector and converted into fluorescent light (3) which is deflected by notches (5) to a solar cell (7).    USE -   For concentrating sunlight onto solar cells.    ADVANTAGE -   Has increased fluorescence durability. Does not require protective overlays.    (US5816238-A)      The collector (10) includes a polymeric matrix containing a dye and hindered amine light stabiliser. The matrix is made of polycarbonate which is transparent and exhibits good optical properties. The dye used is from the thioxanthone, perylene inide and thioindigoid classes of compounds. One or more conventional colorants may be used.    Preferable 2,2,6,6 tetramethyl piperdine compounds are employed as the hindered amine light stabilisers due to their availability. The sunlight is absorbed in the collector and converted into fluorescent light (3) which is deflected by notches (5) to a solar cell (7).    USE -   For concentrating sunlight onto solar cells.    ADVANTAGE -   Has increased fluorescence durability. Does not require protective overlays.    (JP11511592-W)      The collector (10) includes a polymeric matrix containing a dye and hindered amine light stabiliser. The matrix is made of polycarbonate which is transparent and exhibits good optical properties. The dye used is from the thioxanthone, perylene inide and thioindigoid classes of compounds. One or more conventional colorants may be used.    Preferable 2,2,6,6 tetramethyl piperdine compounds are employed as the hindered amine light stabilisers due to their availability. The sunlight is absorbed in the collector and converted into fluorescent light (3) which is deflected by notches (5) to a solar cell (7).    USE -   For concentrating sunlight onto solar cells.    ADVANTAGE -   Has increased fluorescence durability. Does not require protective overlays.