untitled (to Henri Matisse), 1964. Pink, yellow, blue and green fluorescent light, edition 2/3, 8 ft. (244 cm) high. Solomon R. Guggenheim Museum, New York,Panza Collection, Gift, 92.4113. © 2012 Stephen Flavin/Artists Rights Society (ARS). Installation view: Dan Flavin, Guggenheim Museum SoHo, New York, September 13, 1995-January 28, 1996. Photo: David Heald © SRGF
