Hans Haacke: Photo-Electric Viewer-Programmed Coordinate System, 1968. 14 infrared projectors, 14 photoelectronic cells, 28 white light bulbs. More informations: Dreher, Thomas: Der Beobachter als Akteur in Happenings und umweltsensitiven Installationen, chapter III.1. Internet: https://dreher.netzliteratur.net/4_Medienkunst_Text.html #hanshaacke #thomasdreher #artandtechnology #kineticart #cyberneticart #lightinstallation #lightart #lightartist #lightartists #installationart #installationartist #installationartists