Milwaukee landmark now uses 81 percent less energy
01 November 2012
The largest four-sided clock in the Western Hemisphere - the Rockwell Automation clock tower in Milwaukee - has marked its 50th Anniversary with an energy-efficient upgrade.

The Rockwell Automation Clock Tower, a Milwaukee landmark sometimes affectionately referred to as the 'Moon over Milwaukee', celebrates its 50th anniversary with a lighting conversion featuring more than 10,000 new LEDs. The new lights reduce energy consumption by 81 percent and are expected to save approximately $750,000 over their lifetime, compared with the previous fluorescent lights.
According to Murphy Energy Systems, a Milwaukee-based company hired by Rockwell Automation to oversee the project, reduced energy demands for the LED lighting is expected to eliminate 7,239,340 pounds of carbon dioxide over an estimated 20 years usage. This has the environmental impact of planting 44 acres of trees, removing 34 cars from the road and saving 21,937 gallons of petrol each and every year.
The Rockwell Automation Clock Tower
Rising 333 feet above the streets of Milwaukee, the Clock Tower contains four 40-foot octagonal clock faces. Each clock is nearly twice the size of those on the tower housing London’s Big Ben.
Rockwell says it decided not to add chimes to allow London’s to remain the largest four-faced chiming clock in the world!
Both towers held their respective titles of largest clocks in the world until the completion of a clock tower in Saudi Arabia in 2011.
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