Lumen Tropical is a perfect modern design solution for over a desk, a sofa, or in a bedroom. Each mobile is hand balanced, signed by the artist and packaged at the workshop - no assembly required! All arms and nylon-faced disks move independently, 360 degrees. ( this model is intended for indoor use only). Joel Hotchkiss has been designing contemporary kinetic art and mobiles since 1976. His work has been sold in numerous museum stores including the Guggenheim, San Francisco Museum of Modern Art and the Art Institute of Chicago.