1 and 1a: Ceiling widened with fir wood under the flat roof of a speech therapy kindergarten room in Zurich-Schwamendingen. Architects: E. Zietzschmann and Balz Koenig, Zurich. Pairs of plastic lights are mounted on the stiffening double beams. 2 and 2a: Painted wooden grid suspended ceiling with evenly spaced, shielded reflector lights with a free-radiating effect in a lecture hall at Heidelberg University. The lamellar grid panels are attached to suspended longitudinal beams.
