Pol 04 - Reduction of night time light pollution

Extensions and infill developments - KBCN1055

When assessing a new extension or infill development on an existing site, only new lighting specified as part of the assessed works needs to be considered.

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External lighting inside wider building - KBCN0906

Where a building undergoing assessment is located inside of another building, for example a retail unit within a shopping centre, Ene 03 External lighting and Pol 04 Reduction of night time light pollution should be assessed as follows; Ene 03 'External lighting' that is inside of the wider building, using the example above the lighting is external of the retail unit itself but inside of the wider shopping centre, criteria relating to the luminous efficacy should be applied as presented within the manual. For the criteria relating to controlled for prevention of operation during daylight hours and presence detection in areas of intermittent pedestrian traffic, however, instead of demonstrating that the lighting is not operational during daylight hours, it should be demonstrated that the lighting is not operational outside of the operational hours of the wider shopping centre. Any external lighting within the scope of works being assessed that is located outside of the wider shopping centre, for example if the retail unit had an entrance or exit that leads on to the street outside, this would need to be assessed against the criteria presented within the manual. Pol 04 If the building undergoing assessment has no external lighting that is outside of the wider building, it can be considered that the building has no external lighting. However, as above, any external lighting within the scope of works of the assessment that is located outside of the wider building will need to be assessed as the criteria is presented within the manual.

10/05/2019 Reference to specific criteria numbers removed and made applicable to UK NC2018

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Flush stud lighting - KBCN1028

Flush stud lights used for safety purposes in vehicle manoeuvring areas may be excluded from the assessment.

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ILP Guidance Note 1 updated - KBCN1385

Pol 04 references the ILP Guidance notes for the reduction of obtrusive light 2011. This has now been updated to the ILP Guidance note 1 for the reduction of obtrusive light 2021. This is available for free from the ILP website. Requirements Table 2 of the guidance note classifies different lighting environments into Zones E0 to E4. Use this table to define which sets of requirements apply to the assessment. Tables 3-8 of the guidance note define the requirements for criterion 2. For cut-off type luminaires which (by design) block out light in obstructive directions, calculations are not required for meeting requirements relating to:

• Vertical illuminance (Table 3), and
• Luminous intensity (Table 4).

This update will be reflected in the future revisions of the relevant manuals.

02-Nov-2021 Applicability to all UK BREEAM schemes confirmed.
27-Sep-2023 Updated for ILP Guidance Note 1 2021. Requirements clarified. Scheme applicability updated.

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Reduction of night time light pollution – Night-time operation - KBCN0697

Note: This KBCN supersedes INC 2016/INC V6 Pol 04 CN3.1  During hours of operation between 23:00 and 07:00, lighting required for operational reasons does not have to be modified for BREEAM compliance. The aim of this Issue is to reduce light pollution by automatically switching off the external lighting or by complying with lower levels when the building is not in use.    

23 Jan 2023 - Note added to address conflict with INC Pol 04 CN3.1. KBCN title updated for consistency - The technical manual will be updated accordingly in the next re-issue
008 Mar 2018 Wording amended to add clarity.

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Safety and security lighting – definition - KBCN0888

BRE does not provide a specific definition of safety and security lighting, as this could vary, depending on the project and location of the lighting. Together with the design team, the assessor is required to determine which lights are provided purely for safety and security purposes and which should be considered as general lighting.

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Security lighting - KBCN1029

Light fittings specified to comply with specific security standards, but which conflict with the BREEAM criteria, can be excluded from the assessment of this issue. The assessor must obtain evidence confirming the specific security standards and that they are applicable to the assessed development.

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