Michiel Martens and Jetske Visser created “Holon Light”, a light artwork shown at Amsterdam Light Festival 2015 in Amsterdam, Netherlands.
In science, a holon is something that is both a part of something as well as a whole. Think for example of the cells that make up your body, or of atoms that exist individually, but together form a molecule.
Programme information from Amsterdam Light Festival. Short excerpt quoted for reference; see the original page for full text, images and credits.