Low Energy Designs

Case Study Tralee Town Council

Public Area Flood and Street Lighting

[The Square, Tralee, Co. Kerry, Ireland]

PROJECT: Installation of Low Energy Designs SunBURST™ 88 Watt and SunFIRE™ 77 Watt LED luminaires to replace 400 Watt Metal Halide Floodlights and 70 Watt SON Streetlights for Tralee Town Council.

[The Square using Metal Halide and SON Lighting]

Before: The Square using Metal Halide and SON Lighting (Total 5.06 kW)

[The Square using Low Energy Designs LED Lighting]

After: The Square using Low Energy Designs LED Lighting (Total 1.61 kW)

The expectations of the project for Tralee Town Council and the ESB (Electricity Supply Board) were to deploy a public area LED lighting solution that would fulfil the following criteria:

  • To provide comparable or better lighting levels within the selected area
  • To provide consistent and evenly distributed light within the selected area
  • To provide dramatic savings in power consumption and maintenance costs
  • To provide an ability to customize the lighting levels

The independent evaluation provided the following results:

  • Reduced initial capital outlay by 2 luminaries from original installation.
  • Increased illuminance minimum average light level by 1.8 lux
  • Provided an overall saving of 68.1%, excludes the % savings from the maintenance.

Power and Cost Comparison

The following table compares power consumption and operational costs of 17 x Low Energy Designs LED units with the original combination of 19 x Metal Halide and HPS units.

ComparatorMetal Halide and SON FittingsLow Energy Designs LED Units
Total power consumption (kW) per hour average5,065 kW1,616 kW
Yearly operation - 12/7 for 52 weeks22,184.70 kW7,078.08 kW
Cost/ year based on 13 cents per kW hour2,883.92920.15
CO2 (Tonnes)8.87 Tonnes2.83 Tonnes
Yearly saving 2,723.l77
CO2 savings 6.04 Tonnes
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