New York City Mayor Michael Bloomberg and Tishman Speyer Chairman and CEO Jerry Speyer will be on the roof of 45
Rockefeller Center today, Tuesday, November 20th to celebrate the installation of a 61kW (70 kilowatt DC) solar-electric (PV) system designed and managed by altPOWER.

Over the course of a year, the system will generate more than enough electricity to power all of the 30,000 LED lights on the tree that will be illuminated during 42 days this holiday season. The PV system will also offset over 2 million pounds of CO2 over its life-time which would have been created had the tree been powered by conventional fuel sources.

Spectators can view the lighted Rockefeller Center Christmas tree each day from November 29, 2007 to January 8, 2008 (5:30 a.m.-11:30 p.m.); all day on Christmas (24 hours); and from 5:30 a.m.-9 p.m. on New Year’s Eve. A history of Rockefeller Center Christmas trees, as well as more information about the tree, is available on