Energy Standards Take On Daylight Harvesting

Because energy savings will be dependent on factors such as type of available daylight, control response and space and task characteristics, actual savings can be difficult to predict, although studies suggest strong potential. A 2003 study conducted by the National Research Council of Canada discovered 40% energy savings in an open office environment and 50% (with manual blinds) to 70% (manual blinds used optimally, or automatic shading) in private offices. Another 2003 study, conducted by Heschong Mahone Group, found that daylight harvesting strategies can produce 50% energy savings in school classrooms.

http://lightingcontrolsassociation.org/energy-standards-take-on-daylight-harvesting/