From a lighting perspective, Downing Street is not a uniform street. We needed to provide a solution that included access for maintenance, compatibility with security and media cameras, and ensure that the lighting was acceptable for the residents.
The new 3000K LED light engines replaced the original 70W (2800K) HID light sources, effectively maintaining the lighting levels, while using approximately half the energy. In addition, smart light drivers have been incorporated to allow remote monitoring and management. This has the potential to reduce energy by a further 20% with the use of an adaptive lighting approach, controlled through the CMS.
The ability to further upgrade the existing lanterns was an important consideration in the chosen solution. The projected life of the new light sources is approximately 20 years. However, it is expected that LEDs will be upgraded on a six-year cycle to take advantage of advances in technology.
During the course of the project, the Lighting Service took the opportunity to upgrade the earthing of these original gaslight fittings using a discrete ‘clock box’ – a bespoke solution created by us – providing a further safety improvement.
The new scheme has delivered results beyond expectations. Energy savings of over 45% have been achieved and the long life of the LEDs will greatly reduce maintenance requirements. The improved uniformity of light distribution has been welcomed by the security authorities.