Dan Flavin: untitled (to Barnett Newman) two, 1971. Red, yellow, and blue fluorescent lights; 96 × 48 inches (243.8 × 121.9 cm). Doris and Donald Fisher Collection at the San Francisco Museum of Modern Art. © Stephen Flavin / Artists Rights Society (ARS), New York. Photo: Don Ross/Katherine Du Tiel. © This artwork or photo may be protected by copyright. It is posted on the site in accordance with fair use principles.