The choreographer originally created Available Light, now seen as a Minimalist milestone in both dance and music, as a site-specific piece for Gehry’s Temporary Contemporary at Los Angeles’s Museum of Contemporary Art. This past spring at MASS MoCA, she and Gehry revised Available Light for a proscenium stage; the work was just presented in Berlin and (finally!) makes its East Coast premiere this week at the Philly Fringe Festival.