The LED replacement programme only relates to North Yorkshire County Council’s street lighting. Approximately half of our illuminated traffic signs are already LED and the rest will be converted from revenue over the next few years.
NYCC has 50400 street lights of which around 6400 have already been converted to LED.
The total cost for replacing the remaining street lights is £12.9million. The cost includes the provision of 44,000 LED lanterns, installation of approximately 5000 double pole isolators, and where necessary replacing a limited number of columns and bracket arms if the existing equipment is unsuitable.
The accelerated lantern replacement programme is expected to be completed by March 31st 2020 with an anticipated pay back within 10 years, at current energy rates.
The September meeting of the Council’s Executive approved a £2.295million allocation for LED replacements to be undertaken by Ringway during 2017/18. Approval for funding to deliver the remaining work in 2018/19 and 2019/20 will sought in February 2018 as part of the Council budget process. Ringway’s performance over the next 6 months will be considered when determining how we proceed in year 2 and 3 of the project.
Anticipated annual savings of £1.285million will be achieved two ways:
Annual Energy Savings (≈£1.005million) – Energy costs for the existing non-LED lanterns stands at £1.87million. For the purposes of the report we have made an assumption about the anticipated wattages of the proposed LED lanterns based on previous completed designs. The anticipated energy cost associated with these LED lanterns is £864k.
Annual Maintenance Savings (≈£280k) – Existing street lighting is maintained on a 2 or 4 year cycle depending on the lamp type and we are currently experiencing an 8- 9% failure rate each financial year.
With the new LED lighting, maintenance cycles can be extended to 6 years. The nature of LEDs is such that bulk lamp replacements are no longer required which minimises cyclical maintenance requirements. It is anticipated that defects will be reduced to around 2% per year. (For the purposes of the report we allowed a 5% failure rate however our experience with the preferred lanterns shows only 5 failures from over 4500 lanterns in a 4 year period). We will still experience failures on other equipment such as photo cells and isolators hence the expected 2% failure rate.
LED lanterns direct more of the available light down onto the highway which has the added benefit of reducing light pollution (sky glow). By using all the available light to illuminate carriageways and footways we are able to minimise the required wattages on the new lanterns. This will facilitate a reduction in the Council’s annual carbon consumption of over 3000 tonnes.
The preferred lantern has a full 20 year warranty therefore there will be no materials cost in the event of a failure within that time period.
All lanterns will be future proofed to facilitate any Smart Cities initiatives that the Council may wish to pursue.
The most important message we can pass on to County Councillors at this time is that energy prices rose by 15% this year with another 15% increase due by 2020. We don’t know how Brexit will affect us but it is important to note that Nationally 6% of electricity is purchased from Europe as is 60% of the fuel that is used to generate our own electricity.