Inspire : Public Works Sept Oct 2014
There are very important environmental and social bene ts with LED lights. 21 GRAHAM MAWER DIRECTOR, NEXT ENERGY We are in "a time of unprecedented change in street lighting", Graham Mawer, Director at Next Energy told delegates at IPWEA's Sustainability in Public Works conference. In his presentation titled, To w a r d s More Energy Effcient Street Lighting, Mawer noted that the recent activity follows six decades of stagnation in the sector. In IPWEA's new Practice Note, Towards More Sustainable Street Lighting, Mawer and his co-authors Bryan King and Godfrey Bridger of Strategic Lighting Partners, have laid out the emerging street lighting options for councils. During his presentation, Mawer commended the IPWEA for looking into the issue. "We've now got to the point where widespread adoption is a reality," he said. “We are all rapidly pivoting to LEDs.” "There are very important environmental and social benefts with LED lights,” he told delegates. “With LEDs you have to be careful what you ask for because they are so controllable." The nature of LED lighting is that it only places light where it is required. Mawer told of stories where councils have introduced LED lighting, but the lack of spill light on the surrounding buildings has not been taken into account and they are left in the dark while the street itself is bathed in white light. According to Mawer, widespread deployment of LEDs and other energy effcient street lighting in Australia would reduce energy and greenhouse gases by 47 per cent. In the panel discussion following his presentation, Mawer also highlighted opportunities to capitalise on the communications capability of emerging street lighting control systems. He pointed to the work of communications companies Ericsson and Philips, which announced earlier this year that they would work together to develop LED street lights that can be ftted with a small radio base station that could provide cities with additional mobile broadband capacity. Under the proposal, Philips would manage the network of cells and councils would be able to rent the cells to telecommunications utilities or Ericsson, to generate revenue. GEORGE ANGELIS TRAFFIC AND OPERATIONS MANAGER, CITY OF SYDNEY In 2012, City of Sydney started its three-year, $7.1m roll out of LED technology, a project that has since received considerable media attention. The project is replacing, 6448 conventional lights (75 per cent of the city’s lighting stock) with LEDs. City of Sydney Traffc and Operations Manager George Angelis recounted his experience of rolling out LED lighting in Sydney to conference delegates. It all began with City of Sydney's vision to reduce emissions by 70 per cent by 2030. Sustainable street lighting was identifed as an important step towards achieving this target. Angelis cites research and trialling as being the key to successful planning of an energy-effcient street lighting project. Key questions he highlighted included: Are the energy reductions achievable? What does the fnancial business case analysis show? “We asked LED manufacturers to come up with solutions for us," he told delegates. While a number of the manufacturers were optimistic about meeting the objectives, there were some who said the task was impossible. "We had people in the room who said 'you are wasting your time, it's like putting a car onto a pole'." The City of Sydney research and trial period lasted two years prior to implementation. The lights are being supplied by GE Lighting and installed by UGL Limited. While there have been some challenges encountered in retroftting the lights, to date City of Sydney has installed almost 4,000 LED lights. The project has yielded positive results for the City of Sydney, achieving 46.71 per cent energy savings. To date, no failures have been reported. "The City was aware that costs would continue to decrease and perfor mance would improve," he told PWPro. "However the City decided that as a world leading city it had to show courage, innovation and leadership in the implementation of this rapidly developing technology. "The next step for the City could include the implementation of smart controls, which will act as an asset management tool. This will allow staff to reduce inspections, plan future maintenance requirements and record energy use in real time."
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