With his monochrome white on white works, also called 'Lightworks', Van Hoeydonck pioneered the so-called Static Movement (Statische Beweging). The painting itself is static but can only be viewed in motion. These revolutionary works were first presented to the public at the Hessenhuis 'Statische Beweging' exhibition in 1959. They further were the subject of his one-man shows at Galerie Iris Clert, Paris (1961) and the Paleis voor Schone Kunsten, Brussels (1961). In 1962 Paul Van Hoeydonck represented Belgium at the Venice Biennale. The art historical importance of the 'Lightworks' was subsequently realised with the Museum of Modern Art in New York acquiring an example for their collection.
Van Hoeydonck's works are held by museums worldwide: Galleria Comunale d'Arte Moderna, Rome; Israel Museum, Jerusalem; Koninklijk Museum voor Schone Kunsten, Antwerp; Museum of Modern Art, New York; Van Abbemuseum, Eindhoven; The Solomon R. Guggenheim Museum, New York.