Coating compositions, processes and luminescent coated articles

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The invention is directed to a composition having a carrier matrix, and a particulate luminescent composition dispersed therein, the particulate luminescent composition comprising a rare-earth-doped solid-state solution of alkaline earth fluorides represented by the chemical formula          REx(CaaSrbBac)1-xF2+x-2yOy wherein RE represents a three-valent rare-earth element, 0.005≤ x ≤0.20, and 0 ≤ y ≤ 0.2, a+b+c = 1, with the proviso at least two of a, b, and c are not equal to zero. The particulate luminescent composition exhibits a luminescence spectrum having a plurality of intensity peaks at characteristic wavelengths. The invention is further directed to a process comprising contacting a surface with the composition, as well as articles made therefrom.