The City of Ottawa is dedicated to innovation and efficient energy use. One of the strategic initiatives of the 2015-2018 City Strategic Plan is the Energy Management and Investment Strategy. A component to this strategy’s success is to significantly reduce the electrical consumption of the City’s streetlighting network within the strategy’s timeframe.
The Transportation Department is working to meet this goal through the conversion of its street lighting network to Light Emitting Diode (LED) technology. Recent advances in LED technology have made it an attractive replacement to traditional lighting fixtures. On October 14, 2015, the City entered into a partnership with Energy Ottawa, a subsidiary of Hydro Ottawa, who will be completing the conversion. Energy Ottawa will be installing LED lighting and will carry out all on-going maintenance of LED streetlights over the next four years.
The City of Ottawa currently has over 68,000 streetlights made up of either High Pressure Sodium (HPS) or Metal Halide (MH) fixtures. These fixtures account for 17% of the City’s electrical use and cost $7.2 million in annual electricity costs (2014 figures). Streetlight fixtures with the highest energy consumption or highest wattage will be those first converted to LED, decorative light fixtures will not be converted as a part of the project as these are low wattage and therefore do not consume significant amounts of energy. The LED conversion project is city-wide and by the end of the project, up to 58,000 fixtures will be converted to LED.
Extensive improvements in efficiency, output, and costs of LED make the technology an attractive replacement to our existing equipment. The conversion is estimated to reduce energy consumption by over 50%. In addition to energy reduction, LED offers the following benefits:
- Lower maintenance costs: The typical fixtures have life spans ranging from approximately 12,000-18,000 hours. The typical LED life span can range from 50,000 hours up to 100,000 hours.
- More efficient maintenance: LED fixtures will include sensors which generate automatic notifications when a streetlight fixture has failed. This will reduce the down time of fixtures as well as the number of calls received by residents.
- Improved monitoring: Automated controls have the ability to record utility consumption data and allow for billing based on actual usage.
- Greater control: The light output of the LED fixtures can be adjusted throughout their life span, allowing for a more consistent light output, and prolonged life expectancy. A reduction of both up-light and trespass light makes LED more “dark skies friendly”.
- Better quality light: LED technology provides light which is more equivalent to sunlight than conventional fixtures, improving visibility for pedestrians, cyclists and drivers.
For Special Consideration:
The City of Ottawa is committed to the responsible implementation of LED roadway lighting technology by ensuring that all street lighting designs adhere to the most current Illuminating Engineering Society of North America (IES) and Transportation Association of Canada (TAC) standards. To meet these standards, as a part of the conversion project, the City will use a control system that further ensures proper light levels on City streets to minimize any environmental impact.
Additionally, the LED fixtures installed as a part of the conversion project will have similar colour temperatures to existing lighting; new temperatures will not be introduced. For instance:
- The colour temperature on local residential and collector roads will be approximately 3000 Kelvin, which is similar to High Pressure Sodium (HPS) fixtures currently in use.
- The colour temperature on non residential arterial roads will be 4000 Kelvin, similar to whiter light produced by existing Metal Halide (MH) fixtures.
LED streetlight technology focuses light on the roadway, which reduces light pollution including up light, back light and glare. Focused lighting contributes to energy savings through reduced light consumption.
The Right of Way Lighting Policy was updated in 2015 and now permits the use of light emitting diode (LED) technology for all City of Ottawa streetlighting infrastructure.