Innovative hybrid solar lighting reduces waste heat and improves lighting quality

Artificial lighting is the largest component of electricity use in commercial U.S. buildings. Hybrid solar lighting provides an exciting new means of reducing energy consumption while also delivering significant ancillary benefits associated with natural lighting in commercial buildings. The system uses a roof-mounted collector to concentrate visible sunlight into a bundle of plastic optical fibers. The fibers penetrate the roof and distribute the sunlight to multiple "hybrid" luminaires within the building. The hybrid luminaires blend the natural light with artificial light to maintain a constant level of room lighting. During 2005 and 2006 a field-trial demonstration program is being implemented across the U.S. By the year 2011, hybrid solar lighting should be saving the nation over 50 million kWh/year while also dramatically improving lighting quality in commercial buildings. A system cost goal of $4000 has been identified as necessary to meet the previously stated energy savings by 2011.