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BS EN 12464-1:2021 – TC

BS EN 12464-1:2021 – TC

$280.87

Tracked Changes. Light and lighting. Lighting of work places – Indoor work places

Published By Publication Date Number of Pages
BSI 2021 176
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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, electric 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 .

PDF Catalog

PDF Pages PDF Title
58 undefined
66 1 Scope
2 Normative references
67 3 Terms and definitions
4 Symbols and abbreviations
68 5 Lighting design criteria
5.1 Luminous environment
69 5.2 Luminance distribution
5.2.1 General
70 5.2.2 Reflectance of surfaces
5.2.3 llluminance on surfaces
5.3 Illuminance
5.3.1 General
5.3.2 Scale of illuminance
71 5.3.3 Illuminances on the task area or activity area
72 5.3.4 Illuminance on the immediate surrounding area
73 5.3.5 Illuminance on the background area
5.3.6 Illuminance uniformity
74 5.4 Illuminance grid
76 5.5 Glare
5.5.1 General
77 5.5.2 Limiting luminaire luminance
78 5.5.3 Discomfort glare
5.5.3.1 Discomfort glare from daylight
5.5.3.2 Discomfort glare from electric light – application of UGR tabular method
79 5.5.3.3 Determination by UGR formula
80 5.5.4 Veiling reflections and reflected glare
5.6 Lighting in the interior space
5.6.1 General
5.6.2 Cylindrical illuminance requirement in the activity space
5.6.3 Modelling
81 5.6.4 Directional lighting of visual tasks
5.7 Colour aspects
5.7.1 General
5.7.2 Colour appearance of the light
82 5.7.3 Colour rendering
5.8 Flicker and stroboscopic effects
5.8.1 General
5.8.2 Flicker
83 5.8.3 Stroboscopic effect
5.9 Lighting of work stations with Display Screen Equipment (DSE)
5.9.1 General
5.9.2 Luminaire luminance limits with downward flux
84 6 Lighting design considerations
6.1 General
85 6.2 Illuminance requirements and recommendations
6.2.1 General
6.2.2 Lighting of the task area or activity area and its immediate surrounding area (see 5.3)
6.2.3 Lighting of the space
86 6.2.4 Adjustability of the lighting system
6.3 Maintenance factor
87 6.4 Energy efficiency requirements
6.5 Additional benefits of daylight
88 6.6 Variability of light
6.7 Room brightness
7 Schedule of specific lighting requirements
7.1 Composition of the tables
89 7.2 Schedule of task and activity areas
91 7.3 Lighting requirements for task areas, activity areas, room and space brightness
149 8 Verification procedures
8.1 General
8.2 Illuminances
8.3 Unified Glare Rating
8.4 Colour rendering and colour appearance
8.5 Luminaire luminance
8.6 Maintenance schedule
150 Annex A (informative)Recommended practice regarding implementation of UGR tabular method for ‘non-standard’ situations
A.1 General
A.2 Recommended Practices
A.2.1 Deviating luminaire sizes
A.2.2 Irregular area shapes
A.2.3 Irregular luminaire placement patterns
A.2.4 Deviating room reflectances
151 A.2.5 Multiple luminaire types
A.2.6 Luminaires with (only) up-lighting or luminous ceilings
A.2.7 Room dimensions smaller or larger than the tabular values
152 Annex B (informative)Additional information on visual and non-visual (non-image forming) effects of light
B.1 General
B.2 Perceived room brightness
B.3 Alternative parameters
B.3.1 General
B.3.2 Mean ambient illuminance, Ēamb (Govén et al.)[1]
153 B.3.3 Mean room surface luminous exitance, Mrs (Cuttle)[2]
B.3.4 Visual lightness and interest – 40 degree band luminance (Loe et al.)[3]
154 B.4 Adaptation luminance within the normal visual field
B.5 The influence of spectral power distribution on non-image forming effects
B.6 Varying lighting conditions
155 B.7 Daylight provision
156 Annex C (informative)Lighting design considerations – Examples
C.1 Example for offices
157 C.2 Example for industry machine workshop
159 C.3 Example for industrial machine workshop with inspection area
160 C.4 Example for electronics industry
162 Annex D (informative)Transportation areas – Railway installations
D.1 Platform edge
D.2 Limitation of glare for train drivers
D.3 Maintenance sheds
D.4 Circulation areas
163 Annex E (informative)A–deviations

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BS EN 12464-1:2021 - TC
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