TRC

PG&E LEP Lighting Evaluation

TRC conducted a field evaluation of Light Emitting Plasma (LEP) lighting and a wireless lighting control system, as compared to incumbent High Pressure Sodium (HPS) lighting, in a high mast application at a study site in northern California.

Industries

Client

Pacific Gas & Electric

Project Location

Northern California

Light Emitting Plasma (LEP) lighting and a wireless lighting control system offer potential to save significant amount of energy compared to older lighting systems such as High Pressure Sodium (HPS) lighting in high mast applications. However these savings are unproven and there are questions about equivalent illuminance levels and savings persistence.

TRC conducted a field evaluation of Light Emitting Plasma (LEP) lighting and a wireless lighting control system, as compared to incumbent High Pressure Sodium (HPS) lighting, in a high mast application at a study site in northern California. TRC conducted long term energy monitoring and lighting quality assessments to evaluate energy savings, illuminance levels and lighting quality of the LEP technology with controls as compared to the incumbent technology.

TRC provided an objective assessment of the technology to the client and provided key insights into the potential benefits and weaknesses of the LEP lighting system. These include:

  • LEP lighting provides significant power savings compared to HPS
  • LEP lighting provides greatly improved visual quality compared to HPS
  • LEP fixtures did not experience significant lumen depreciation
  • Wireless lighting controls provide significant energy savings and greatly improved control and flexibility
  • LEP light levels were significantly lower than HPS using traditional ‘photopic’ illuminance metrics but comparable light levels using the ‘mesopic’ illuminance metrics.
  • LEP dimming results in low light output with high power consumption
  • Wireless lighting controls experienced functionality problems which need to be addressed through product refinement

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