This is a 46-minute lecture by the Californian artist Robert Irwin (b 1928) during an event of the Chicago Humanities Festival in January 2010.  He is one of the founders of the Light and Space movement in the 1960s. His work focuses on the issues of light and space within a specific site or environment, stressing on the perceptual experience of the self within the context of its surroundings.  In this lecture he talks not only about light but also its inherent element of shadow, his concept and installations. His large scale work “Scrim veil-Black rectangle-Natural Light” of 1977 at the Whitney Museum of American Art in New York has been re-installed and is currently on view in the original site of the museum’s uptown building until September 1.