A light assembly includes a core, a light source, and a functional layer. The core extends along a centerline, and includes a base end, a distal end, a first side spanning axially between the base and distal ends, and a second side opposite the first side and spanning axially between the base and distal ends. The second side includes an unbinding element axially extending partially between the base and distal ends. The light source is adapted to emit light rays into the core at the base end. The functional layer is laterally spaced from the first side, axially extends partially between the base and distal ends, and is axially aligned to the unbinding element.