Alex Cooper, NPG lighting designer, on lighting the exhibition "Calder's Portraits: A New Language." Alex Cooper uses Calder's portrait of composer Edgar Varese (1883-1965) as an example of lighting three-dimensional objects in exhibits. Recorded at NPG, May 5, 2011. Image: Edgar Varese / Alexander Calder / Wire, c. 1930 / Whitney Museum of American Art, New York / Copyright 2010 Calder Foundation, New York / Artists Rights Society (ARS), New York . See more portraits on the exhibit website: http://www.npg.si.edu/exhibit/calder/