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BEAM P
LUS FOR
E
XISTING
B
UILDINGS
I
NDOOR
E
NVIRONMENTAL
Q
UALITY
(I
EQ
)
V
ERSION
1.2
I
EQ
17
I
NTERIOR
L
IGHTING IN
N
ORMALLY
O
CCUPIED
A
REAS
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 137
6
IEQ
6.6
L
IGHTING
Q
UALITY
I
EQ
17 I
NTERIOR
L
IGHTING IN
N
ORMALLY
O
CCUPIED
A
REAS
E
XCLUSIONS
Residential buildings, hotels and apartment buildings.
O
BJECTIVE
Ensure the adequacy and maintenance of visual comfort conditions
achieved by the electric lighting provisions in occupied spaces.
C
REDITS ATTAINABLE
1 + 1 BONUS
P
REREQUISITES
None.
C
REDIT REQUIREMENT
1 credit where the prescribed lighting performance in each type of
premises in respect of illuminance and lighting quality is achieved.
It is required to fulfill the following:
(i) (i) prescribed lighting performance in respect of maintained illuminance
and illumance variation; and
(ii) (ii) the limiting unified glare rating is achieved and light sources have an
appropriate colour rendering index.
1 BONUS credit for providing automatic control of artificial lighting such
as daylight sensors at perimeter zones and/or occupancy sensors.
A
SSESSMENT
The design criteria for interior lighting shall be at the discretion of the
Client but shall embrace both ‘quantity’ and ‘quality’ of the lighting
system performance including: maintained horizontal, and where
appropriate vertical, illuminance, illuminance variation, limiting glare
index, colour rendering, and modulation of light output appropriate to the
type and use of the premises/indoor spaces.
The criteria adopted shall be based on authoritative guidance, such as
that provided in CIE [1,2], CIBSE [3] and/or IESNA [4] publications, or
equivalent. As the focus is on lighting for comfort and productivity,
lighting for performing arts, display decoration, ambience. etc., will
normally be excluded from consideration.
Compliance with the assessment criteria shall be demonstrated by
measurements using a standardised measurement protocol appropriate
to the parameter being assessed. Demonstration of compliance requires
that the maintained illuminance take into account lighting maintenance
plan (the period for luminaire cleaning and group re-lamping) appropriate
to the circumstances [5].
The Client shall submit a report prepared by a suitably qualified person
detailing the ‘as installed’ lighting systems or, for premises/spaces not
fitted-out, the technical details of the proposed lighting systems for each
type of normally occupied space within the building. The report shall
detail the design criteria and the results of measurements or other
means of demonstrating compliance. For premises to be fitted out by
tenants compliance shall be confirmed if the technical details and
contractual arrangements with tenants in respect of lighting installations
are deemed to meet the assessment criteria.
The Client shall submit a report prepared by a suitably qualified person
detailing the automatic control of artificial lighting such as daylight
1
Commission Internationale de l'Eclairage (CIE). Lighting of Indoor Work Places. CIE Standard S 008/E.
2
Commission Internationale de l'Eclairage (CIE). Discomfort Glare in Interior Lighting. CIE 117-1995.
3
The Chartered Institution of Building Services Engineers. Code for interior lighting. London. CIBSE.
4
Illuminating Engineering Society of North America. Lighting Handbook, Reference & Applications. 9
th
edition., New York.
5
Commission Internationale de l'Eclairage (CIE). Maintenance of indoor electric lighting systems. CIE Technical Report -
Publication No. 97. Vienna.