High Performing Buildings, Spring 2014, by Robert Anthony Hans & Kenny Stanfield.
http://www.hpbmagazine.org/File%20Library/Case%20Studies/Spring%202014/030-037_LED.pdf

"When designers of the first net zero energy school in the U.S. considered how they would approach the lighting design differently using today’s LED technology, the results extended far beyond just switching out the lightbulbs. The hypothetical redesign of Richardsville (Ky.) Elementary classrooms involves rethinking the daylighting design based on the evolution of LED lighting and the cheaper cost of photovoltaics (PV)."