Chromoluminarism, also known as Divisionism, is a technique used by Neo-Impressionists such as Georges Seurat (1859-1891). The technique involves breaking color into its basic elements, painting in very small and regular dots. From a distance the multiple dots form an optical mixture of color. The best known example is Seurat's Sunday Afternoon on the Island of La Grande Jatte (1884-1886).
Most television and computer screens operate in a similar way.
Another, similar, variety of Neo-Impressionism is pointillism, which involves painting in dots, though not necessarily with the aim of breaking colour.
Italian Divisionist painters include Giovanni Segantini, Giuseppe Pellizza da Volpedo, Emilio Longoni, Vittore Grubicy de Dragon, Luigi Russolo, Gaetano Previati, Angelo Morbelli, Filippo Carcano, Plinio Nomellini and Alessio Di Lernia.