A sculpture in red, yellow, and blue fluorescent light by Dan Flavin, titled untitled (to Piet Mondrian), dated 1985.

Dan Flavin 

untitled (to Piet Mondrian)

, 1985

Red, yellow, and blue fluorescent light

8 ft. (244 cm) high

Photo by Billy Jim, New York 
© Stephen Flavin/Artists Rights Society (ARS), New York

A sculpture in red, yellow, and blue fluorescent light by Dan Flavin, titled untitled (to Piet Mondrian), dated 1985.