Photos: GreenBuild comes to Boston

Solatube showed off a few models of its daylighting system, which pipes daylight from outdoors inside. This model has a Fresnel lens which directs the light onto a reflective surface in the tube. The company sells the daylighting tubes to businesses, such as warehouses, to cut down on lighting bills.

Photo by Martin LaMonica/CNET News

Caption by Martin LaMonica