Abstract: An improvement is disclosed in a solar reflector having a first form member, a second form member, the first and second form members having peripheries having identical form surfaces along portions thereof, a generally rectangular flexible sheet having a reflective surface, opposite edges and lateral edges, a structure which secures the opposite edges to the identical form surfaces with the reflective surface being infacing, the reflective surface having a shape defined by the identical form surfaces, the shape being such that light striking the reflective surface is redirected generally onto an axis extending generally parallel to the sheet from the first form member to the second form member, an energy absorbing target extending along the axis, and a tensioning structure for tensioning the sheet between the first and second form members. The improvement comprises having the tensioning structure act between the first and second form members.