The plans to retrofit conventional lamps with energy-saving LED illumination on the George Washington bridge and the Holland Tunnel were approved by the Port Authority of New York and New Jersey's board of commissioners.
A $4.5 million project eventually will replace more than 4,200 fluorescent fixtures at the Holland Tunnel with 1,736 LED fixtures. The new lamps will last 15 years, compared with the roughly 18-month life span of the existing lights, providing an estimated annual saving of $340,000, says the article.
The George Washington bridge will see a one-for-one replacement of 156 mercury vapor lamps on the bridge's cables. The $200,000 project will results in annual savings of $50,000.
The current fixtures, which provide aesthetics and do not light the roadway, must be replaced as often as each year. Agency officials also are considering converting the roadway lights, says the newspaper article.
Both projects are annually expected to reduce carbon dioxide emissions by more than 3.3 million pounds and nitrogen oxides by 5,000 pounds. Work on the bridge and the tunnel is slated to start and finish in 2008.