157 One of the most successful examples of daylighting in a large commercial office building is Lockheed's Building 157 in Sunnyvale, California. The sloped ceiling directs additional daylight to the center of each floor and decreases the perception of crowded space in a very densely populated building. Daylighting is also enhanced by a central atrium, or litetrium, as the architects call it. The litetrium runs top to bottom and has a glazed roof.
Workers love it.
They consider it the building's most attractive feature. In the winter, the interior light shelves diffuse reflected light and reduce glare during lower winter sun angles. Finally, continuously dimmable fluorescents with photocells were installed to maintain a constant level of light automatically and save even more energy. The daylighting has saved Lockheed about 75 percent on its lighting bill. Since daylight generates less heat than office lights, the peak air conditioning load is also reduced.