In between passive daylighting design strategies and active solar-powered lighting, these systems can bring unfiltered daylight into the deepest recesses of nearly any building
Mirror-lined tubes, fiber optic cables, and solar tracking devices are just a few of the cutting-edge daylighting systems that are making the fanciest double-paned, triple-glazed, argon-filled, and low-emissivity windows seem rather passé. ... Each of these systems captures more daylight and can deliver it deeper within a building than simple windows and skylights, and each can operate without the energy and maintenance costs associated with photovoltaic systems that convert light into electricity and then back to light again.
By Nalina Moses
The American Institute of Architects