Neighbourhood LED Installations
About LED Street Lighting
Due to improvements in LED technology, the use of LEDs in roadway lighting fixtures has been a new development within the industry. Manufacturers are introducing LED fixtures in their line of products. As LEDs becoming more advanced and cost-effective, manufacturers and consumers consider the LED fixtures the future of roadway lighting.
How LEDs Work
Light-emitting diodes (LEDs) are semiconductor devices that emit light when an electric current passes through them. They are designed for better control over the electrical current making them have low current, heat and voltage. This results in longer lifespan, lower maintenance costs and energy savings.
The lifespan of LED Streetlights is determined by its light output compared to its original design specification. Once its brightness decreases by 70%, an LED Streetlight is considered to be at the end of its life.
LED Street Lighting Pilot Project
The City of Edmonton initiated pilot projects to test and temporarily install energy efficient fixtures at locations across the city. Each test area consist of 5 LED fixtures from several different manufacturers.
LED Light Conversion
Replacement of the existing High Pressure Sodium Street Lights with LED Street Lights began in residential areas in 2011. Replacements will be done in conjunction with the neighbourhood rehabilitation program and the neighbourhood LED retrofit programs.
Neighbourhood Rehabilitation Programs
These are complete reconstructions of neighbourhoods. The entire street light system is replaced. This includes bases and underground cabling.
Neighbourhood LED Retrofit Program
This program selects neighbourhoods that are in the middle of their life span. The retrofit program targets neighbourhoods with poor pole conditions and old luminaires. Both the pole and luminaires will be replaced in these areas. This will include the conversion of alley lighting. The existing base and cable will remain until the neighbourhood is eventually selected in the future for full reconstruction.
Benefits of LED light fixtures over High Pressure Sodium fixtures
- More energy efficient providing energy savings
- Longevity and decreased energy consumption offer significant maintenance savings
- Control of light dispersion spreads light out evenly and reduces light pollution and light trespass
- Reduces CO2 emissions
Conversion from the conventional street lighting to LED technology will result in power consumption reductions between 40% and 60% per light, depending on each particular manufacturer.
Light replacement is in line with the previous conversion to LED Traffic Signals in 2006.
LED fixture lifetimes haven’t been time tested. A schedule for upgrades and maintenance should be initiated to determine the actual life of the fixture. Overall, the positive benefits of LED fixtures make them a focus as they become more advanced and cost-effective.