Source:Tarr-rosenblum
From Pittsburgh Streets
Joel A. Tarr and Anna Rosenblum. "Pittsburgh's illuminating history: Conversion to LEDs is part of a long quest for bright, efficient streetlights, write Joel A. Tarr and Anna Rosenblum." The Next Page. Pittsburgh Post-Gazette, Aug. 7, 2016. https://www.post-gazette.com/opinion/Op-Ed/2016/08/07/The-Next-Page-Pittsburgh-s-conversion-to-LEDs-is-part-of-a-long-quest-for-bright-efficient-streetlights-write-Joel-A-Tarr-and-Anna-Rosenblum/stories/201608070005.
