Coatable compositions, coatings prepared therefrom, process 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 alkaline earth fluoride represented by the formula          RExA1-xF2+x-2yOy wherein RE represents a three-valent rare-earth element, A is alkaline earth, 0.002≤x ≤0.20, and 0 ≤y ≤x; the particulate luminescent composition exhibiting a luminescence spectrum having a plurality of intensity peaks at characteristic wavelengths. It is further directed to a process by contacting a surface with the composition and articles made therefrom.