SIST EN 12464-1:2021

SLOVENSKI STANDARD
oSIST prEN 12464-1:2019
01-september-2019
Svetloba in razsvetljava - Razsvetljava na delovnem mestu - 1. del: Notranji
delovni prostori
Light and lighting - Lighting of work places - Part 1: Indoor work places
Licht und Beleuchtung - Beleuchtung von Arbeitsstätten - Teil 1: Arbeitsstätten in
Innenräumen
Lumière et éclairage - Éclairage des lieux de travail - Partie 1: Lieux de travail intérieurs
Ta slovenski standard je istoveten z: prEN 12464-1
ICS:
91.160.10 Notranja razsvetljava Interior lighting
oSIST prEN 12464-1:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12464-1:2019


DRAFT
EUROPEAN STANDARD
prEN 12464-1
NORME EUROPÉENNE

EUROPÄISCHE NORM

July 2019
ICS 91.160.10 Will supersede EN 12464-1:2011
English Version

Light and lighting - Lighting of work places - Part 1: Indoor
work places
Lumière et éclairage - Éclairage des lieux de travail - Licht und Beleuchtung - Beleuchtung von
Partie 1: Lieux de travail intérieurs Arbeitsstätten - Teil 1: Arbeitsstätten in Innenräumen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 169.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12464-1:2019 E
worldwide for CEN national Members.

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Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Lighting design criteria . 7
4.1 Luminous environment . 7
4.2 Luminance distribution . 8
4.2.1 General . 8
4.2.2 Reflectance of surfaces . 8
4.2.3 llluminance on surfaces . 9
4.3 Illuminance . 9
4.3.1 General . 9
4.3.2 Scale of illuminance . 9
4.3.3 Illuminances on the task or activity area . 9
4.3.4 Illuminance on the immediate surrounding area . 10
4.3.5 Illuminance on the background area . 11
4.3.6 Illuminance uniformity . 13
4.4 Illuminance grid . 13
4.5 Glare . 14
4.5.1 General . 14
4.5.2 Discomfort glare . 14
4.5.3 Shielding against glare . 14
4.5.4 Veiling reflections and reflected glare . 15
4.6 Lighting in the interior space . 15
4.6.1 General . 15
4.6.2 Mean cylindrical illuminance requirement in the activity space . 16
4.6.3 Modelling . 16
4.6.4 Directional lighting of visual tasks . 16
4.7 Colour aspects . 16
4.7.1 General . 16
4.7.2 Colour appearance . 17
4.7.3 Colour rendering . 17
4.8 Flicker and stroboscopic effects . 17
4.8.1 General . 17
4.8.2 Flicker. 18
4.8.3 Stroboscopic effect . 18
4.9 Lighting of work stations with Display Screen Equipment (DSE) . 18
4.9.1 General . 18
4.9.2 Luminaire luminance limits with downward flux . 18
5 Lighting design considerations . 19
5.1 General . 19
5.2 Illuminance requirements and recommendations . 19
5.2.1 General . 19
5.2.2 Lighting of the task or activity area and its immediate surrounding area (see 4.3.1) . 20
5.2.3 Lighting of the space . 20
5.2.4 Operation of the lighting system . 20
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5.3 Maintenance factor . 21
5.4 Energy efficiency requirements . 21
5.5 Additional benefits of daylight . 22
5.6 Variability of light . 22
5.7 Room brightness . 22
6 Schedule of lighting requirements . 23
6.1 Composition of the tables . 23
6.2 Schedule of task and activity areas . 24
6.3 Lighting requirements for task and activity areas . 26
7 Verification procedures . 66
7.1 General . 66
7.2 Illuminances . 66
7.3 Unified Glare Rating . 66
7.4 Colour rendering and colour appearance . 66
7.5 Luminaire luminance . 66
7.6 Maintenance schedule . 66
Annex A (informative) Typical values of grid point spacing . 67
Annex B (informative) Recommended practice regarding implementation of UGR for ‘non-
standard’ situations . 68
B.1 General . 68
B.2 Recommended Practices . 68
B.2.1 Deviating Luminaire sizes . 68
B.2.2 Irregular area shapes . 68
B.2.3 Irregular luminaire placement patterns . 68
B.2.4 Deviating room reflectance values . 68
B.2.5 Multiple luminaire types . 69
B.2.6 Luminaires with (only) up-lighting or luminous ceilings . 69
B.2.7 Room dimensions smaller or larger than the tabular values . 69
Annex C (informative) Additional information on visual and non-visual (non-image
forming) effects of light . 70
C.1 General . 70
C.1.1 General . 70
C.1.2 Perceived room brightness . 70
C.1.3 Alternative parameters . 70
C.1.4 Adaptation luminance within the normal field of view . 71
C.1.5 The influence of spectral power distribution on non-image forming effects. . 72
C.1.6 Varying lighting conditions . 72
C.1.7 Daylight penetration . 72
Annex D (informative) Lighting design considerations - Examples . 74
Bibliography . 78
Index . 80

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European foreword
This document (prEN 12464-1:2019) has been prepared by Technical Committee CEN/TC 169 “Light
and lighting”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12464-1:2011.
The original standard EN 12464-1:2002 was already further developed in its first revision
EN 12464-1:2011. It specifies the requirements for good lighting solutions rather than giving design
guidelines. With the experience of applying the standard next steps are taken in the development of this
new edition and human and user needs are given broader acknowledgement. Lighting requirements for
task areas to fulfil visual tasks are given a close relation to the space in which they are carried
out. Technologically LED has taking over as the light source from conventional lamps. The main
changes with respect to the previous edition are:
— User needs are better reflected by adding an additional level of recommendations in the tables in
Clause 6 next to the minimum requirements. This gives more emphasis to already existing
requirements in 4.3.3.
— The impact of visual and non-image forming effects of light are elaborated in the new Annex C.
— Requirements for walls, ceilings and cylindrical illuminances are moved from the main text to the
tables in Clause 6 for increased visibility and usability.
— A new chapter on design considerations (Clause 5) gives advice on how to apply the requirements
when designing lighting for visual tasks and activities within a space.
— Relation between task area and its immediate surround and the background area is more detailed
(4.3.3, 4.3.4, 4.3.5).
— Glare requirements have been clarified for improved usability including clarification for shielding
in 4.5 and recommended practices for UGR in non-standard situations has been added in a new
Annex B.
— Flicker and stroboscopic effect is updated (4.8).
— A new Annex D is introduced including examples on how to derive the requirements in different
applications (office/industry) for designing lighting.
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Introduction
Adequate and appropriate lighting enables people to perform visual tasks efficiently and accurately
including tasks performed over a prolonged time period or of a repetitive nature. The degree of
visibility and comfort required in a wide range of work places is governed by the type and duration of
the activity. The lighting also affects circadian rhythms and mood as well as improving our performance
and well-being.
The final designed, installed and operated lighting system should provide efficient and effective good
quality lighting for the user needs tailored to their visual capacity, e.g. elderly users in workplaces.
It is important that all clauses of this document are followed although the specific requirements are
tabulated in the schedule of lighting requirements (see Clause 6).

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1 Scope
This document specifies lighting requirements for humans in indoor work places, which meet the needs
for visual comfort and performance of people having normal, or corrected to normal ophthalmic
(visual) capacity. All usual visual tasks are considered, including Display Screen Equipment (DSE).
This document specifies requirements for lighting solutions for most indoor work places and their
associated areas in terms of quantity and quality of illumination. In addition, recommendations are
given for good lighting practice including visual and non-visual (non-image forming) lighting needs.
This document does not specify lighting requirements with respect to the safety and health of people at
work and has not been prepared in the field of application of Article 169 of Treaty on the Functioning of
the European Union although the lighting requirements, as specified in this document, usually fulfil
safety needs.
NOTE Lighting requirements with respect to the safety and health of workers at work can be contained in
Directives based on Article 169 of Treaty on the Functioning of the European Union, in national legislation of
member states implementing these directives or in other national legislation of member states.
This document neither provides specific solutions, nor restricts the designers´ freedom from exploring
new techniques nor restricts the use of innovative equipment. The illumination can be provided by
daylight, artificial lighting or a combination of both.
This document is not applicable for the lighting of outdoor work places and underground mining or
emergency lighting. For outdoor work places, see EN 12464-2 and for emergency lighting, see EN 1838
and EN 13032-3.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12193, Light and lighting — Sports lighting
EN 12464-2, Light and lighting — Lighting of work places — Part 2: Outdoor work places
EN 12665, Light and lighting — Basic terms and criteria for specifying lighting requirements
EN 13032-1, Light and lighting — Measurement and presentation of photometric data of lamps and
luminaires — Part 1: Measurement and file format
EN 13032-2, Light and lighting — Measurement and presentation of photometric data of lamps and
luminaires — Part 2: Presentation of data for indoor and outdoor work places
EN 15193-1, Energy performance of buildings - Energy requirements for lighting - Part 1: Specifications,
Module M9
EN 17037, Daylight in buildings
EN ISO 9241-307, Ergonomics of human-system interaction — Part 307: Analysis and compliance test
methods for electronic visual displays (ISO 9241-307)
ISO 3864-1, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety
signs and safety markings
ISO/CIE/TS 22012, Light and lighting - Maintenance factor determination - Way of working
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12665, EN 17037 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
activity area
area which contains one or more visual tasks
Note 1 to entry: Visual tasks can be different in type and/or position.
Note 2 to entry: A room may contain one or more activity areas.
Note 3 to entry: An activity area is usually a horizontal area. Otherwise the orientation needs to be specified by
the designer.
4 Lighting design criteria
4.1 Luminous environment
For good lighting practice it is essential that as well as the required illuminances, additional qualitative
and quantitative needs are satisfied.
Lighting requirements are determined by the satisfaction of three basic human needs:
— visual comfort, where the workers have a feeling of well-being; in an indirect way this also
contributes to a higher productivity level and a higher quality of work;
— visual performance, where the workers are able to perform their visual tasks, even under difficult
circumstances and during longer periods;
— safety.
The main parameters determining the luminous environment with respect to artificial light and
daylight are:
— luminance distribution;
— illuminance;
— directionality of light, lighting in the interior space;
— variability of light (levels and colour of light);
— colour rendering and colour appearance of the light;
— glare;
— flicker.
Values for illuminance and its uniformity on task or activity areas, illuminances in the space, discomfort
glare and colour rendering index are given in Clause 6; other parameters are described in Clause 4.
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NOTE In addition to the lighting there are other visual ergonomic parameters which influence visual
performance, such as:
— the intrinsic task properties (size, shape, position, colour and reflectance properties of detail and
background),
— ophthalmic capacity of the person (visual acuity, depth perception, colour perception),
— intentionally improved and designed luminous environment, glare-free illumination, good colour rendering,
high contrast markings and optical and tactile guiding systems can improve visibility and sense of direction
and locality. (See CIE 227 Lighting for Older People and People with Visual Impairment in Buildings.)
4.2 Luminance distribution
4.2.1 General
The luminance distribution in the visual field controls the adaptation level of the eyes which affects task
visibility.
A well balanced adaptation luminance is needed to increase:
— visual acuity (sharpness of vision);
— contrast sensitivity (discrimination of small relative luminance differences);
— efficiency of the ocular functions (such as accommodation, convergence, pupillary contraction, eye
movements, etc.).
The luminance distribution in the visual field also affects visual comfort. The following should be
avoided for the reasons given:
— too high luminances and luminance contrasts which can give rise to glare;
— too high luminance variation which will cause fatigue because of constant re-adaptation of the eyes;
— too low luminances and too low luminance contrasts which result in a dull and non-stimulating
working environment.
To create a well-balanced luminance distribution the luminances of all surfaces shall be taken into
consideration and will be determined by the reflectance of and the illuminance on the surfaces. To avoid
gloom and to raise adaptation levels and comfort of people in buildings, it is highly desirable to have
bright interior surfaces. Room brightness is considered by specifying illuminances on walls and ceiling
(see clause 6). Annex C provides further details of possible measures.
Although luminance requirements would be more accurate, this standard lists illuminance
requirements as luminance requirements are not practical due to their dependence on exact material
characteristics and viewing positions.
The lighting designer shall consider and select the appropriate reflectance and illuminance values for
the interior surfaces based on the guidance below.
4.2.2 Reflectance of surfaces
High surface reflectances contribute to energy savings and may lead to better visual comfort. For choice
of materials, recommended reflectances are:
— ceiling: 0,7 to 0,9;
— walls: 0,5 to 0,8;
— floor: 0,2 to 0,6.
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The reflectance of major objects (like furniture, machinery, etc.) should be in the range of 0,2 to 0,7.
NOTE Clear interior glass has a typical reflectance of 0,1.
In design calculations, surface reflectance values should be defined as close to the real surfaces as
possible taking into account the variation in reflectance across the surface.
4.2.3 llluminance on surfaces
Clause 6 provides minimum requirements for the illuminance on walls (Ē ) and ceiling (Ē )
m,wall m,ceiling
depending on the tasks and/or activities being performed in the space. Uniformity for walls and ceiling
shall be U ≥ 0,10 (see 4.3.6).
o
Illuminances on walls and ceilings together with surface reflectances (see 4.2.2) are indicators for
perceived room brightness.
NOTE Additional guidance can be found in Clause 5.
4.3 Illuminance
4.3.1 General
Areas to be lit are task and activity areas, the immediate surrounding and background area, walls,
ceiling and objects in the space.
The illuminance and its distribution on the task area and on its immediate surrounding area have a
great impact on how quickly, safely and comfortably a person perceives and carries out the visual task.
All values of illuminances specified in this European Standard are maintained illuminances and fulfil
visual comfort and performance needs.
For calculation and measurement of illuminance averages and uniformities the grid specification in 4.4
shall be used.
4.3.2 Scale of illuminance
To give a perceptual difference the recommended steps of illuminance (in lx) are according to
EN 12665:
20 - 30 - 50 - 75 - 100 - 150 - 200 - 300 - 500 - 750 - 1 000 - 1 500 - 2 000 - 3 000 - 5 000
4.3.3 Illuminances on the task or activity area
The values
...