The small canvas portrays an interior of a bedroom with a wooden floor and bare walls, which it enters, becoming the protagonist of a ray of sunshine that illuminates and emphasizes the whiteness of the sheet. Raggio di sole, dates back to the years in which Pellizza, even if due to age limits he could no longer be regularly enrolled in academic courses, attended the Carrara Academy in Bergamo and was admitted as a "special student of prof. Heel "(Scotti, 1986, 10). Shortly thereafter, after a stay in Paris on the occasion of the Universal Exposition, he will feel the need to study and work from life, paying particular attention to the effects of light and getting closer and closer to the Divisionist research that he would later share, in the years to come. , with friends Plinio Nomellini and Angelo Morbelli. The entry of the work into the collections of the Civic Museum took place in 1952, on the occasion of the post-war rearrangement of the exhibition rooms.