Installations
From 1968 Irwin focused on the site itself by creating installations in rooms, gardens, parks, museums, and various urban locales. Influenced, in particular, by the paintings of John McLaughlin, Irwin and other Light and Space artists became curious about pushing the boundaries of art and perception, in the 1970s Irwin left studio work to pursue installation art that dealt directly with light and space: the basis of visual perception, in both outdoor and modified interior sites. These installations allowed for an open exploration for artist and viewer of an altered experience created by manipulating the context of environment rather than remaining with the confines of an individual work of art. Other artists involved in the Light and Space movement include John McCracken, James Turrell, Peter Alexander, Larry Bell, Craig Kauffman, Doug Wheeler, and Maria Nordman.
In 1970, the Museum of Modern Art invited Irwin to create an installation. Using the entire project space, Irwin suspended a white scrim 10 feet from the ground and attached shimmering stainless steel wires to the wall. In 1971 the Walker Art Center commissioned the artist to create Untitled (Slant/Light/Volume) for the inaugural exhibition of its Edward Larrabee Barnes-designed building. Suspended between the floor and ceiling, his Full Room Skylight - Scrim V (1972/2022) comprises two sheets of translucent fabric stretched in a “V” shape across two connected galleries; from overhead, the fabric is illuminated by abundant natural light beaming through the skylights, both concealing and revealing the surrounding architecture depending on variables such as brightness, time of day, and the viewer's vantage point. For Soft Wall, a 1974 installation at Pace Gallery in New York City, Irwin simply cleaned and painted a rectangular gallery and hung a thin, translucent white theater scrim eighteen inches in front of one of the long walls, creating the effect of an empty room in which one wall seemed permanently out of focus.
A permanent wall installation in the entrance corridor of the Allen Memorial Art Museum, the dimensions of Untitled (1980) exactly repeat those of the deep-set windows just opposite. In the early 1980s, Irwin was invited to participate as a collaborating artist in designs for the rejuvenation and improvement of the Miami International Airport. In 1997 he transformed a room that overlooks the Pacific at the La Jolla branch of the Museum of Contemporary Art San Diego. To celebrate its 125th anniversary, the Indianapolis Museum of Art commissioned Irwin to create Light and Space III (2008), thereby becoming the first U.S. museum to have a permanent indoor installation of the artist. For the piece, Irwin arranged fluorescent light bulbs in an irregular grid pattern across the walls surrounding the escalators, with a veil of scrim framing each side; as museum visitors go up and down between floors, they move through the piece. Trifecta (Joe's Bar & Grill), a three-story permanent light installation at Swiss Re's corporate headquarters in Fort Wayne, Indiana, was inaugurated in 2012.
In late 2013, a 33-foot-tall acrylic column by Irwin was unveiled at the San Diego Federal Courthouse, where the artist worked with his longtime friends and collaborators, architect Martin Poirer and landscape architect Andrew Spurlock, on the courthouse's outdoor plaza. The three-story-tall acrylic column, built decades ago but never given a proper home due to a series of unforeseen circumstances, refracts light and cast colors as the sun moves through the lobby. The fabrication of the columns and the technical issues related to the material, were all executed by Jack Brogan, a central character in the evolution of the techniques in the Light and Space Movement. The challenge and technique of polishing the columns to the required transparency was invented by Brogan and remains a high water mark in the field.
For the Los Angeles County Museum of Art (LACMA), Irwin created an outdoor installation of primal palm trees (Primal Palm Garden, 2008–2010) as well as an indoor 36-foot-long fluorescent light sculpture, Miracle Mile (2013), which glows behind them 24 hours a day.
After having been working and reworking his ideas to create a giant installation for the Chinati Foundation since the early 2000s, Irwin's installation in Marfa, Texas — a U-shape construction about 10,000 square feet — began in early 2015 and be completed and opened to the public in 2016. The installation, situated at the building that had housed the former Army barracks' hospital, will be the first major installation added to the Chinati Foundation since 2004 as well as the first freestanding structure designed by Irwin that is devoted solely to his work.
Other installations by Irwin included; Fractured Light – Partial Scrim – Eye Level at the Museum of Modern Art, New York (1970–1971); Black Line Room Division + Extended Forms at the Whitney Museum, New York (1977); 48 Shadow Planes at the Old Post Office Pavilion, Washington, D.C. (1983); Ascending at the Musee d' Art Moderne de Ville, Paris, France (1994); and Double Diamond at the Musée d'Art Contemporain, Lyon, France (1997–1998).