Illuminating the public realm – the importance of public lighting The right approach


To provide good lighting installations an Authority should aim to meet the requirements of what is termed Ultra Efficient Lighting (UEL). This is defined as providing the right light, in the right place at the right time, controlled by the right system.


Golden Jubilee Bridge, London*


This can be further broken down as follows: 


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Right light – using the correct light source which provides the required colour rendering and colour temperature for the task being lit, also ensuring that the appropriate levels of light are provided on the task area


Right place – ensuring that through the use of good optics and luminaires only the task being considered is lit with little or no spill light using the minimum number of lighting points


At the right time– lighting is only operating at the times required


Right controls – the use of good control systems can ensure that the lighting system is operating at maximum efficiency, and in some cases can also be self- monitoring, reporting outages and energy consumption to the user.


Further efficiencies can be gained by ensuring that any installations are designed by competent designers who understand the requirements of the tasks being lit and the relevant standards, and who look to a whole life costing assessment of the technology and options available to provide an energy and carbon efficient installation.


Westminster City Council and Institution of Lighting Professionals


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