The historic clerestory windows provide plenty of natural daylighting and helps reduce the electrical load required for lighting at the Exploratorium. (Photo by Bruce Damonte)

The historic clerestory windows provide plenty of natural daylighting and helps reduce the electrical load required for lighting at the Exploratorium. (Photo by Bruce Damonte)

The historic clerestory windows provide plenty of natural daylighting and helps reduce the electrical load required for lighting at the Exploratorium. (Photo by Bruce Damonte)