By Kerry Trueman

The City That Never Sleeps keeps its bridges burning bright, all night, and you can see them more than 25 miles away. That’s a lotta wattage. So Mayor Bloomberg’s putting the Brooklyn Bridge on an energy diet, switching the landmark bridge’s 160 100-watt mercury vapor lamps to 24-watt LED bulbs.

The lights will be replaced next year, just in time for the bridge’s 125th birthday, and the move will save an estimated 134 tons of greenhouse gases annually.