The present invention relates to a process for producing a photoluminescent composition and the composition obtained, in particular from granular photoluminescent compounds, chosen in particular and not exclusively from the following families, based on an inorganic matrix and a doping ion, said photoluminescent composition being intended to be introduced with at least one filler into a transparent matrix. The process includes a preparation step: - Choose a first photoluminescent compound PH1 with a particle size range comprising a peak centered on a value P1 corresponding to a diameter D1 of particles, - Choose at least a second photoluminescent compound PH2 with a particle size range comprising a peak centered on a value P2 corresponding to a diameter D2 of particles, - Choose the diameter D2 equal to the maximum measurement M1 of the volume space V1 released by the presence of at least four particles of diameter D1 juxtaposed. Figure for the abstract: Figure 1
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