By the Numbers: Incandescent Grand Central Terminal replaces its last incandescent lightbulb

$200,000

Amount the Metropolitan Transportation Authority says its will save on annual electricity costs now that it has replaced all the incandescent lightbulbs with compact fluorescent lightbulbs at Grand Central Terminal, the Beaux-Arts train station on 42nd Street that opened in 1913.

Electricians from MTA Metro-North Railroad today removed 110 incandescent bulbs from one of 10 11x18-foot "melon" chandeliers in the terminal (shown), the last of more than 4,000 incandescent bulbs that have been replaced over the past two years in public areas of the landmarked facility.

The MTA says the installation of CFLs is part of its efforts to earn LEED Silver status for the terminal.

If you haven't swapped out incandescents for CFLs at your home, remember that each CFL you install can save you at least $30 over its life. Buy Energy Star-qualified bulbs, which use about 75 percent less energy and are backed by warranties that run as long as nine years.—Steven H. Saltzman | e-mail | Twitter

Essential information: Next time you're in New York City, take a tour of Grand Central Terminal—it's a very worthwhile way to spend an hour or two. Just don't go during the morning or evening rush.