03. External lighting – Above Green

(1 credit available)

Aim

To recognise and encourage the specification of energy efficient light fittings for existing and new lighting within the scope of refurbishment works.

Assessment criteria

The following is required to demonstrate compliance:

One credit

The building has been designed to operate without the need for external lighting (which includes on the building, signs and at entrances).

OR alternatively, where the building does have external lighting, one credit can be awarded as follows:

The average initial luminous efficacy of the external light fittings within the construction zone is not less than 60 luminaire lumens per circuit Watt.

All external light fittings are automatically controlled for prevention of operation during daylight hours and presence detection in areas of intermittent pedestrian traffic.

Checklists and tables

None.

Compliance notes

Ref	Terms	Description
Applicable assessment criteria
CN1	Part 1: Fabric and structure	Not applicable.
CN1.1	Parts: 2 and 3	All assessment criteria are applicable.
CN1.2	Part 4: Interior design	Not applicable.
General
CN2	Single building assessments on larger sites or campuses and partial refurbishments of existing buildings	Where the building being assessed forms part of a larger site (or is a partial refurbishment of 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.
CN2.1	Excluded lighting types	Temporary lighting such as theatrical, stage or local display installations, where specified, can be excluded from assessment under this issue. Decorative lighting, security lighting and floodlighting must, however, not be exempt from the assessment criteria.

Methodology

Average initial luminous efficacy of the external light fittings

The individual luminous fluxes of all luminaires within the refurbishment or fit-out 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).

Note: LED lamps are typically integral to the luminaire (LED luminaires). As such, the manufacturers' literature will encompass both lamp and luminaire as a whole.

Evidence

Criteria	Interim design stage	Interim post-construction stage
All	One or more of the appropriate evidence types listed in 4.0 The BREEAM evidential requirements section can be used to demonstrate compliance with these criteria.

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.
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 (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.
Refurbishment or fit-out zone: For the purpose of this BREEAM issue the Refurbishment or Fit-out zone is defined as the area of the building undergoing refurbishment or fit-out for the BREEAM-assessed building, and the external site areas that fall within the scope of the new works.
Time switch: A switch with an inbuilt clock which will allow lighting to be switched on and off at programmed times.

Other information

None.