Joseph Beuys, Capri Battery Author mediachef Post 12.10.2009 Tags electricity, Joseph Beuys, light installation Joseph Beuys, "Capri Battery," 1985. via "On Light InSight," ICC Gallery. Courtesy: The National Museum of Art, Osaka Photo: FUKUNAGA Kazuo “The lemon’s acidity generates a weak electrical current, causing it to function as a battery, and illuminate the bulb.” via ICC Online