[danudey]

The Lion's Gate Bridge, which I believe is the busiest bridge in Vancouver, BC, relatively recently upgraded their lighting to LED. It reduced power consumption by 90%, and saves the city $30,000/yr in energy and maintenance.

In addition to the power savings, the old bulbs lasted an average of 72 hours between replacements, while the new ones have an estimated lifetime of 12 years, and replacing them is the 'hidden' cost that a lot of people wouldn't normally consider (and replacing bulbs mounted on a bridge is even worse than replacing street lights).

http://en.wikipedia.org/wiki/Lions_Gate_Bridge#History

[nkurz]

You've accurately quoted the cited article, but that "72 hours" in the article is itself uncited and has to be in error. Normal mercury bulbs are good for 10,000+ hours, and 100W is well within normal. Maybe it was supposed to be 72 months? If you are strong enough to wade into Wikipedia politics, the edit came in here: http://en.wikipedia.org/w/index.php?title=Lions_Gate_Bridge&...