Decision details

Streetlighting Dimming Trial II

Decision Maker: Executive Director - Regeneration, Housing and Environment

Decision status: Recommendations Approved

Is Key decision?: No

Is subject to call in?: Yes


This decision sets out to initiate a second trial-based approach that will eventually lead to implementing a borough-wide adaptive streetlighting regime, to achieve significant carbon, energy and cost savings.

As part of a joint project with Reading and Wokingham between 2016 and 2018, most streetlights were replaced with LEDs. Immediately after the new network was up and running, the lighting output was set at 70%. This dimming by 30% can now be considered our baseline. Since 2018, the Council’s inventory of street lighting has increased, not least by adoption of the former SSE network on the Slough Trading Estate. However, no further assessment of its efficiency and cost-effectiveness has been carried out until we conducted a light dimming trial between January 23 and March 23.

To develop an adaptive lighting strategy that meets the following objectives:

• Providing a cost-effective public street lighting service;
• Conserving energy and promoting sustainability, both environmentally and financially;
• Controlling light pollution;
• Promoting a general feeling of well-being and supporting night-time economy; and
• Aiding movement across the network.


To proceed with a second dimming trial covering the trial areas:

Zone 1: Upton Court
Zone 2: Cippenham Manor
Zone 3: Manor Park & Stoke
Zone 4: Colnbrook
Zone 5: Cippenham Village
Zone 6: A355 Tuns Lane (between M4 j6 and the Copthorne Roundabout)
Zone 7: A412 Uxbridge Road (Sainsbury’s Roundabout to Borough Boundary)

Alternative options considered:

Several dimming options will be tested and observed as part of the trial.

Publication date: 01/02/2024

Date of decision: 07/12/2023

Effective from: 09/02/2024

Accompanying Documents: