(all buildings)
| Number of credits available | Minimum standards |
|---|---|
| 1 | No |
Aim
To recognise and encourage the specification of energy efficient light fittings for external areas of the development.
Assessment criteria
The following is required to demonstrate compliance:
One credit
| 1 | The building has been designed to operate without the need for external lighting (which includes on the building, signs and at entrances). |
OR
| 2 | The average initial luminous efficacy of all the external light fittings within the construction zone at least 70 luminaire lumens per circuit watt. |
| 3 | All external light fittings are automatically controlled for prevention of operation during daylight hours and fitted with presence detection in areas of intermittent pedestrian traffic. |
Checklists and tables
None.
Compliance notes
| Ref |
Terms |
Description |
|---|---|---|
| Shell and core (non-residential and residential institutions only) | ||
|
CN1 |
Applicable assessment criteria |
Both options: All criteria relevant to the building type and function apply. Refer to Appendix D – Shell and core project assessments for a more detailed description of the shell and core assessment options. |
| Residential - Partially fitted and fully fitted | ||
|
CN2 |
Applicable assessment criteria - Single and multiple dwellings | Both options: All criteria relevant to the building type and function apply. Refer to Appendix E – Applicability of BREEAM New Construction to single and multiple dwellings, partially and fully fitted for a more detailed description of residential assessment options. |
| General | ||
|
CN3 |
Single building assessments on larger developments or campuses (and extensions to existing buildings) | Where the building being assessed forms part of a larger development (or is an extension to an existing building) containing common areas and other buildings, the scope of the external lighting criteria applies only to external new and existing lighting within the construction zone of the assessed building. |
|
CN3.1 |
Temporary lighting, decorative lighting, and floodlighting | Temporary external lighting (such as theatrical, stage, and local display installations) is excluded from the assessment. Decorative, security, and floodlighting must be included in the assessment. |
|
CN3.2 |
Lighting for external plant | Manually activated lighting which is only used when maintenance work is being carried out on external plant is excluded from this assessment. |
|
CN3.3 |
Emergency lighting |
Maintained systems featuring emergency light fittings which are also used for normal operation, are assessed for this issue. Non-maintained lighting which is only activated in an emergency can be excluded from the assessment. (KBCN0185) |
|
CN3.4 |
Automatic controls - External lighting inside wider building |
Where the building undergoing assessment is located inside another building, for example a retail unit within a shopping centre, criterion 3 should be applied to prevention of operation outside the occupation hours of the wider shopping centre rather than during daylight hours . Any external lighting located outside of the wider shopping centre should be assessed as stated in the criteria. (KBCN0906) |
|
CN3.5 |
Automatic controls - Night-time operation |
Projects which operate at night-time can adapt or omit the requirement to provide controls or presence detection to align with the building’s hours of operation. (KBCN1048) |
Methodology
Average initial luminous efficacy of the external light fittings
The individual luminous fluxes of all luminaires within the construction zone are summed (in lumens), then divided by the total circuit watts for all the luminaires.
For lamps other than LED lamps, the luminous flux of a luminaire using those lamps can be determined by multiplying the sum of the luminous fluxes produced by all the lamps in the luminaire by the light output ratio of the luminaire (as confirmed by the luminaire manufacturer).
Evidence
| Criteria | Interim design stage | Final post-construction stage |
|---|---|---|
| All |
The relevant section or clauses of the building specification or contract. Design drawings. |
BREEAM Assessor’s site inspection report and photographic evidence or as-built drawings. Manufacturers' product details. |
| 1 | Night-time lighting levels report or any other relevant study. |
BREEAM Assessor’s site inspection report and photographic evidence or as-built drawings. Night-time lighting levels report or any other relevant study. |
Additional information
Relevant definitions
- Automatic control
- An automatic external lighting control system that prevents operation during daylight hours through either a time switch or a daylight sensor (a manually switched lighting circuit with daylight sensor or time switch override is also acceptable) in addition to providing presence detection in areas of intermittent traffic.
Note: for external lighting not fitted with presence detectors, time switches must provide automatic switch off of lighting after a specified curfew hour, except in cases where there is a specific requirement for lighting to be left on all night. - Construction zone
- For the purpose of this issue the construction zone is defined as the site which is being developed for the BREEAM-assessed building and its external site areas, i.e. the scope of the new works.
- Daylight sensor
- A type of sensor that detects daylight and switches lighting on at dusk and off at dawn.
- Luminous efficacy (in luminaire lumens per circuit watt)
- The ratio between the luminous flux produced by an entire luminaire (light fitting) (in lumens) and the total power consumed by the lamps and the control gear contained within the luminaire (in watts).
- Presence detector
- A sensor that can turn lighting on when a presence is detected in the scanned area, and off after a preset time when no presence is detected. Presence detectors must be compatible with the lamp type used as very frequent switching can reduce the life of some lamp types.
- Time switch
- A switch with an inbuilt clock which will allow lighting to be switched on and off at programmed times.
Other information
None.