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Best Practice

City of Torbay

New LED street lighting in Torbay, United Kingdom

The previous lighting system

The previous system included 961 high pressure sodium street lighting luminaires with electomagnetics ballasts.

The new LED lighting system

In 2015, 1091 LED luminaires were installed. A more cold white colour temperatur that aided night time driving was chosen. This white colour also allowed to reduce to reduce the luminance and energy energy consumption but still providing a safe lighting. For some of the luminaires, the power consumption was reduced to around a third of the previous consumption. A Central Management System (CMS) allows remote dimming of highway lights as traffic flow reduces. Torbay Council was able to reduce the operational time of each streetlight by 15 minutes per day due to the remote operation of the new LEDs.

Results

Large energy savings were achieved. The payback period is only 4.6 years. To display the aesthetics of the lighting system, a drone was used to provide an aerial view to allow comparison of the lighting quality delivered.

Lessons learned

The project demonstrated a flexible approach including replacement and upgrading of street lights. The LED light sources are able to provide better facial recognition and increase the safety for drivers, even when the lighting is dimmed at night time. Positive feedback was received from both councillors and the public. Due to the success of this project, Torbay Council has explored further roll-out of the upgrade into more residential areas with replacement of conventional sodium luminaires with dimmable LEDs luminaires.

Short description of the technical lighting system

  • Replacement of 961 older high pressure sodium street luminaires, the majority of which operate at 172 W, with the GE Spinella LED street luminaire, operating at 61W
  • For 1091 newer luminaires, Torbay Council made upgrades to use of an LED light source instead of carrying out a full replacement. 404 of these lamps had electromagnetic ballast which is retrofitted to electronic ballast and more energy savings
  • A Central Management System (CMS) allows remote dimming of highway lights as traffic flow reduces
  • Torbay Council was able to reduce the operational time of each streetlight by 15 minutes per day due to the remote operation of the new LEDs