LED fixtures

The Emerald City puts the streetlight of the future to the test – for both safety and feel, and the results could affect how cities everywhere are illuminated in the future, reports William Yardley.
Mar 14, 2012   New York Times
South Broad Street in downtown Philadelphia looks a bit blue at times. But stick around for a few minutes and its complexion changes.
Jul 31, 2009   New Urban News