greens crossing greens (to Piet Mondrian who lacked green)

Dan Flavin, greens crossing greens (to Piet Mondrian who lacked green), 1966. Green fluorescent light, Two sections: first section: 4 feet (122 cm) high x 20 feet (610 cm) wide; second section: 2 feet (61 cm) high x 22 feet (670 cm) wide

Employing only commercial fluorescent lights in his work,

The Guggenheim Museums and Foundation