Isambard Brunel Car Park

Portsmouth, United Kingdom

Isambard Brunel multi-story car park is situated in the centre of Portsmouth and is maintained by Portsmouth City Council. The car park is open 24 hours a day, seven days a week and has 468 spaces.



The main aims of the new lighting scheme were to improve the lighting levels and minimise energy usage, through the use of Smart controls, while maintaining a safe and inviting environment for the public.


Thorlux proposed the use of high efficiency Thoroproof LED SmartScan luminaires combined with stand-alone SmartScan emergency luminaires. Projects utilising the Thorlux SmartScan System can frequently benefit from energy savings in excess of 70% through daylight dimming and maintained illuminance. Flexible time-delays and security levels allow presence detection to be used safely within the car park environment while minimising energy usage during times of low occupancy.



Significant reduction in installation and maintenance costs

"The multi-storey car park is rarely used between the hours of midnight and 6am therefore we required a system to dim the lights when the car park was not in use to give the greatest amount of energy saving without impacting safety. The SmartScan system gave us 3 advantages;

  1. Reduced installation costs.

  2. Automatic status and energy monitoring of the lighting.

  3. Automatic testing of the emergency lighting system.

Although there was a higher capital cost associated with the luminaires, the overall project cost was reduced due to the significantly lower installation complexity. There was no requirement to install standalone sensors, and their associated data control cables, as the Smartscan sensors are encompassed within the luminaire. This also greatly reduces the risk of damage or vandalism.

The changing of the system parameters and commissioning of the system is fairly simple and can be modified should the car park requirement change without any installation work.

The operational running costs have been greatly reduced as the system is being constantly remotely monitored. Early indications show that the electricity usage has dropped by 43% and we expect the savings to increase as we enter spring/summer and the daylight control has a bigger impact. We are also making significant savings on maintenance as the old luminaires were frequently failing and regular walk arounds were required to visually identify failures"

George Butler

Electrical Design Engineer, Portsmouth City Council