At the Kimbell Art Museum direct sunlight penetrates only at the west-facing entry lobby, which has a large span of clear glass. To protect the entrance of direct sunlight on this fagade, Kahn extended one module of the vaulted roof and used an array of trees to filter sunlight. Few sculptures are displayed in the lobby, where much of the social and gathering activities take place. In the rest of the museum, sunlight penetration occurs only in small areas next to the narrow openings at the end of the vaulted ceiling, mainly in areas toward the south and west of the building. These discreet sun patches move slowly throughout the day without ever reaching the display areas. The movement of these bright surfaces gives to visitors and museum workers a subtle indication of the sun movement, highly appreciated by them. Figure 7 shows a view of the south wall of the central gallery, where soft reflected light bounces off the metal reflective panels onto the vaulted ceiling. Illuminance levels on the display areas throughout the museum do not exceed 50 lux.

The Amon Carter Museum

Direct sunlight was observed in three different galleries of the Amon Carter Museum: the East-facing gallery (entry lobby), the South-facing (2nd floor), and North-gallery adjacent to atrium (2ndfloor),