Architecture, Building and Structure Design Light Welling House Residence for Single Family by Teruo Miyahara The Light Welling House is standing on a narrow site. So the designers had to think about how to bring the sunlight inside. Their solution to ensure natural lighting was to design the stairs as a path of light that would be able to distribute natural light to each room. The stairs are made of perforated metal to let the light seep through, and the stairwell has glass walls to allow the light to shine into each room as well as to lead and reflect the light from the top to lower levels. The positioning of the stairs was also a critical factor and therefore decided carefully, calculating the altitude of the winter sun.