February 1, 2013, will be the 100th anniversary of the opening of Grand Central Terminal. To help prepare for the occasion, Metro-North electricians polished and dusted the historic melon chandeliers that illuminate the Terminal, and replaced bulbs as needed. When the chandeliers were installed a century ago, they carried bare, energy-hungry incandescent bulbs. Today they use efficient compact fluorescent bulbs that use just 5 watts to provide the same amount of light as the previous 25-watt bulbs. Each chandelier holds 110 light bulbs.