
Dan Flavin. untitled (to Mary Ann and Hal with fondest regards) 2, 1976. Green and pink fluorescent light, 8 ft. (244 cm) square across a corner. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. "monument" for V. Tatlin, 1964. Cool white fluorescent light, 8 ft. (244 cm) high. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. untitled (to dear, durable Sol from Stephen, Sonja and Dan) two, 1969. Daylight and cool white fluorescent light, 8 ft. (244 cm) square across a corner. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. untitled (for Frederika and Ian) 1, 1987. Pink and red fluorescent light, 6 ft. (183 cm) long on the diagonal. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. untitled (for Frederika and Ian) 2, 1987. Pink, red, and yellow fluorescent light, 6 ft. (183 cm) long on the diagonal. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. untitled (for Frederika and Ian) 4, 1987. Pink, blue, and green fluorescent light, 6 ft. (183 cm) long on the diagonal. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. untitled (to Cy Twombly) 2, 1972. Cool white and daylight fluorescent light, 4 ft. (122 cm) square across a corner. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. "monument" for V. Tatlin, 1968. Cool white fluorescent light, 8 ft. (244 cm) high. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. untitled, 1995. Red and green fluorescent light, 4 ft. (122 cm) wide. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.

Dan Flavin. untitled, 1995. Yellow, green, and red fluorescent light, 4 ft. (122 cm) wide. © 2018 Estate of Dan Flavin / Artists Rights Society (ARS), New York. Courtesy David Zwirner and PKM Gallery.