2018 – Spectrum Chamber, Museum of Old and New Art (MONA) Hobart, Tasmania
2005 – 4 over 5 +72, Highlands University, Las Vegas, New Mexico
2004 – Conversations with the Sun, Meiji University, Tokyo, Japan
2004 – Spectrum 8, Smithsonian Institution, NMAI (National Museum of the American Indian), Washington DC
2004 – Solar Spectrum, Albuquerque Convention Center, Albuquerque, NM
2001 – Eighteen over Five, Eugene and Marion Kauffman Foundation, Kansas City, MO
1999 – Spectrum 12, Saitama University, Saitama, Japan
1998 – Solar Spectrum, US Federal Courthouse, Tampa, Florida
1996 – Dwan Light Sanctuary, United World College, Montezuma, NM; commissioned by Virgina Dwan
1996 – Pythagorus’ Rainbow, Cook Institute, Grand Rapids, MI
1993 – Year of Solar Burns, Chateau d’Oiron, Oiron, France; commissioned by the Ministry of Culture (3/20/92-3/20/93)
1992 – Solar Spectrum, Harvard Business School Chapel, Cambridge, MA
1990 – Latitude 41°, Central Naugatuck Higher Education Center, Waterbury, CT; Connecticut Commission on the Arts.
Tumbling 12, Alaska International Airport, Anchorage, AK; commission: Alaska Percent for Art.
1987 – Light Lines, San Francisco International Airport, San Francisco, CA
1986 – Light, Rock, Water, Wells Fargo Plaza, San Diego, CA
1985 – Light Gates, Linclay Corporation, Kansas City, MO
1985 – Lines of Light, Rays of Color, Plaza of the Americas, Dallas, TX
1983 – West Light, Towson State University, Towson, MD; commission: Maryland State Arts Council with N.E.A. support.
1983 – Rock Bow, Cumberland Station, O’Hare Rapids, MI
1982 – Toward Seven, Grand Rapids Art Museum, Grand Rapids, MI
1980 – Spectrum Building, Denver CO
1979 – Dietrich Foundation, Philadelphia, PA
1979 – Prestonwood Town Center, Dallas TX
1977 – Two Prisms form the Origin of Color, University of Pennsylvania, Philadelphia, PA
1976 – GSA Art and Architecture Program, Federal Courthouse, Lincoln, NE
Solar Spectrum for Porat Yeshivat Joseph, Old City, Jerusalem, Israel. (Moshe Safdie, Architect). Not Built.