The Rockefeller Center Christmas tree will be using a lot less energy this season as it is going "greener" — with energy-saving lights replacing old-fashioned bulbs this year.

NYC Mayor Michael Bloomberg announced yesterday that the tree will be lit up with 30,000 LED lights for the first time and this will reduce energy consumption from 3,510 kilowatt hours per day to just 1,297 — a savings that, as the AP points out, is roughly equivalent to the amount of electricity consumed by a typical 2,000-square-foot house in a month.