New street lighting reduces electricity costs in Örnsköldsvik

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information facts

beST PrACTICe eXAMPLeS enerGY eFFICIenCY KLMP – CLIMATe InVeSTMenT PrOGrAMMe

FebrUArY 2010

Photograph: Ö-vik energi Ab

new street lighting reduces

electricity costs in Örnsköldsvik

The Municipality of Örnsköldsvik has replaced large parts of its street lighting with modern light fixtures and low-energy lamps. Lower electricity consumption and reduced maintenance costs are some of the gains, while the streets have also become better lit.

The new lamps, known as ceramic metal halogen lamps, deliver substantially more light per kilowatt hour than the old mercury and high-pressure sodium lamps. As a result, total electricity consumption for lighting has decreased. The lamps do not need to be positioned so close together and also last longer, with the result that they also reduce the municipality’s maintenance costs. It is also pos-sible to control them so that they shine less strongly at times and places where full power is not needed.

The project is a good example of how reduced costs can finance further pro-jects and energy efficiency within a municipality. The project was implemented in 2008 and 2009, with grants from the climate investment programme Klimp.

PositiVE EnVironmEntaL anD Economic imPacts

• Consumption of electricity has decreased by nearly 1,660 MWh per year. • More than 3,500 dismantled mercury lamps mean that around 21 grams of

mercury have been removed from the lighting network.

• Reduced electricity and maintenance costs create scope for continued replace- ment of older light fixtures and contribute to enabling certain smaller commu-nities to retain their street lighting instead of losing it.

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beST PrACTICe eXAMPLeS enerGY eFFICIenCY KLMP – CLIMATe InVeSTMenT PrOGrAMMe

FebrUArY 2010 ISbn: 978-91-620-8546-9 imPLEmEntation The Municipality of Örnsköldsvik has removed nearly 4,400 older light fixtures with outputs of 125–250 Watts and replaced them with just over 2,700 light fixtures with ceramic metal halogen lamps of the Prismalence Cobra brand. These have an output of 35–70 Watts, but thanks to a better light fixture disperse the lighting better. The project has encompassed both rural and urban areas. The new lighting has 185 light fixtures provided with intelligent control, which means that they can be remotely monitored and dimmed to 60 percent of the lamp’s output. By removing one in two lamp-posts, it has been possible to maintain street light-ing in areas where the maintenance costs would otherwise have become too great.

However, the change did not take place without protests from residents, who were worried that it would be too dark when one in two lamps was removed. It therefore had to be explained and demonstrated that the new light fittings yielded better light.

PotEntiaL anD fUtUrE BEnEfit

Energy efficiency of lighting is an extensive and clear need globally. The fact that many countries are phasing out energy-guzzling lighting and introducing vari-ous kinds of need-based control is driving the shift in technology in the area of lighting. The combination of better light fixtures, new lamps and the possibility of controlling and dimming the lighting opens up the possibility of significant sav-ings. There is great potential for similar projects, and the potential can be trans-ferred to other county councils, municipalities or countries.

whY beST PrACTICe

The project is a good example of how a municipality, by lowering its electricity and maintenance costs, can afford to replace older light fixtures and retain street lighting in certain smaller communities. The project has also been able to contribute to increasing the general level of interest in new and innovative technology.

Ceramic metal halogen lamps are an innovative alternative suited to many contexts. The project shows that a new 35 watt lamp can replace an older 125 or 250 watt lamp without any deterioration in light yield, if it is fitted to a suitable fixture that reduces light diffusion. Many conventional light fixtures lack the possibility of controlling and dimming the light points when the need is not so great.

FOr FUrTher InFOrMATIOn Contact:

Jan nyman,

Municipality of Örnsköldsvik,

0660-888 16, jan.nyman@ornskoldsvik.se Anna rudsten, Övik energi,

0660-789 53, anna.rudsten@ovikenergi.se Contractors/providers:

Prismalence Ab developed the technology of the prismatic lens.

nordic Light Ab designed and manufactured the Cobra fixture.

Vattenfall Service nord Ab supplied the light fixture.

The project on the Internet: www.ornskoldsvik.se/klimp

For further information on best Practice: www.naturvardsverket.se/mir www.swedishepa.se/bestpractice FACTS Klimp Örnsköldsvik 2004 Action 9 environmental investment: SeK 6.4m Grant: SeK 1m