A sculpture in red fluorescent light by Dan Flavin, titled monument 4 for those who have been killed in ambush (to P.K. who reminded me about death), dated 1966.

Dan Flavin 

monument 4 for those who have been killed in ambush (to P.K. who reminded me about death)

, 1966

Red fluorescent light

8 ft. (244 cm) 6 ft. (183 cm) deep

Photo by Cathy Carver 
© Stephen Flavin/Artists Rights Society (ARS), New York

A sculpture in red fluorescent light by Dan Flavin, titled monument 4 for those who have been killed in ambush (to P.K. who reminded me about death), dated 1966.