Keith Sonnier at Whitechapel Gallery, London

Keith Sonnier, Ba-O-Ba VI, from the “Ba-O-Ba” series, 1970, foam rubber, neon tubes, transformer, and wiring.

WOLFGANG STAHL/©2016 ARTISTS RIGHTS SOCIETY (ARS), NEW YORK/COURTESY THE ARTIST AND HAEUSLER CONTEMPORARY, MUNICH AND ZURICH