http://cityroom.blogs.nytimes.com/2012/05/07/with-new-lights-a-more-vibrant-look-for-the-empire-state-building/
nytimes.com
LEDs Coming to the Empire State Building

<p style="margin-left:20px"><a href="https://www.harvardmagazine.com/2012/02/a-green-empire " target="_blank"> <img src="https://harvardmagazine.com/sites/default/files/HM_forWebRedesign_final.png" alt="View related Harvard Magazine article" title="View related Harvard Magazine article">Read more on this topic in <span style="font-style:italic; font-weight:600;">Harvard Magazine</span></a></p>