Utilizing fluorescent light tubing available on the commercial market, Dan Flavin created light installations (or “situations” as he preferred to call them) that became icons of Minimalism. Flavin’s wall- and floor-mounted, site-specific fixtures, composed of intersecting and parallel lines of light in conventional colors, flood spaces with their glow. A number of the sculptures feature tubes traversing corners or doorways, or at a right angle to the wall, further engaging the architecture of a room. As Flavin’s installations grew more complex, so too did the spaces built expressly for the purpose of exhibiting them. In 1959, when Flavin was shortly employed as a guard and elevator operator at the Museum of Modern Art, he met fellow Minimalists Sol LeWitt, Robert Mangold, and Robert Ryman.