Deemed the “most sustainable building in the world” by World Architectural News, Seattle’s Bullitt Center daylight reins supreme. Eighty percent of the building is illuminated by daylight when daylight is available. Electric light is integrated sparingly where needed to provide minimal ambient light and user-controlled task lighting. The daylight and electric lighting controls work in harmony to help keep energy use 70 percent below code and within the power budget allowed by the photovoltaic array on the roof.