ISO/CIE 8995-1:2025

Light and lighting — Lighting of work places — Part 1: Indoor

This document specifies lighting requirements for humans in indoor work places, which meet the needs for visual comfort, performance and safety of people having normal, or corrected to normal visual capacity and response to light. This document specifies requirements for lighting solutions for typical indoor work places and their associated areas in terms of quantity and quality of illumination. The illumination can be provided by daylight, electric light sources, or a combination of both. This document gives recommendations for good lighting to fulfil the needs of integrative lighting. This document neither provides specific solutions nor recommendations for atmosphere or aesthetics created by lighting. It does not restrict the designers' freedom from exploring new techniques nor restrict the use of innovative equipment. This document is not applicable for emergency lighting. For emergency lighting, see ISO 30061.

Lumière et éclairage — Éclairage des lieux de travail — Partie 1: Intérieur

Razsvetljava delovnega mesta - 1.del: Notranji prostori

General Information

• Status: Published
• Publication Date: 30-Jan-2025
• ICS: 13.180 - Ergonomics
• ICS: 91.160.10 - Interior lighting
• Technical Committee: ISO/TC 274 - Light and lighting
• Drafting Committee: ISO/TC 274/JWG 5 - Lighting for work places (joint working group with CIE-JTC 15)
• Current Stage: 6060 - International Standard published
• Start Date: 31-Jan-2025
• Due Date: 31-Jan-2025
• Completion Date: 31-Jan-2025
• Ref Project: SIST ISO/PWI 8995-1:2019 - Lighting of work places -- Part 1: Indoor

Relations

• Revises: ISO 8995-1:2002/Cor 1:2005 - Lighting of work places — Part 1: Indoor — Technical Corrigendum 1
• Effective Date: 30-Jun-2018
• Revises: ISO 8995-1:2002 - Lighting of work places — Part 1: Indoor
• Effective Date: 30-Jun-2018

Standards Content (Sample)

International
Standard
ISO/CIE 8995-1
First edition
Light and lighting — Lighting of
2025-01
work places —
Part 1:
Indoor
Lumière et éclairage — Éclairage des lieux de travail —
Partie 1: Intérieur
Reference number
© ISO/CIE 2025
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Published in Switzerland
© ISO/CIE 2025 – All rights reserved
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations . 2
5 Lighting design criteria . 3
5.1 General .3
5.2 Luminance distribution .4
5.2.1 General .4
5.2.2 Average luminance of surfaces .4
5.2.3 Reflectance of surfaces .5
5.2.4 Illuminance on surfaces .6
5.3 Illuminance .6
5.3.1 General .6
5.3.2 Scale of illuminance .6
5.3.3 Illuminances on the task area or activity area .6
5.3.4 Illuminance on the immediate surrounding area .8
5.3.5 Illuminance on the background area .8
5.3.6 Illuminance uniformity .9
5.4 ipRGC-influenced responses to light – Melanopic Equivalent Daylight Illuminance .9
5.5 Illuminance grid .10
5.6 Glare . 12
5.6.1 General . 12
5.6.2 Limiting luminaire luminance . 13
5.6.3 Discomfort glare .14
5.6.4 Veiling reflections and reflected glare .16
5.7 Visual appearance of objects and people within the interior space .16
5.7.1 General .16
5.7.2 Shadows .16
5.7.3 Cylindrical illuminance requirement in the activity space .16
5.7.4 Directional lighting of visual tasks areas .16
5.7.5 Modelling .16
5.8 Colour aspects .17
5.8.1 General .17
5.8.2 Colour appearance of the light source .17
5.8.3 Colour rendering .17
5.9 Temporal light modulation (TLM) .18
5.10 Lighting of work stations with Display Screen Equipment (DSE) .18
5.10.1 General .18
5.10.2 Luminaire luminance limits with downward flux .19
6 Lighting design considerations . 19
6.1 General .19
6.2 Illuminance requirements and recommendations . 20
6.2.1 General . 20
6.2.2 Lighting of the task area or activity area and its immediate surrounding area . 20
6.2.3 Lighting of the space . 20
6.2.4 Variability and adjustability of light .21
6.3 Maintenance factor . 22
6.4 Energy performance . 23
6.5 Daylight . 23
6.6 Room brightness .24

© ISO/CIE 2025 – All rights reserved
iii
7 Schedule of specific lighting requirements .24
7.1 Composition of the tables .24
7.2 Schedule of task areas and activity areas . 25
7.3 Lighting requirements for task areas, activity areas, room and space brightness .27
8 Verification procedures .88
8.1 General . 88
8.2 Illuminances . 88
8.3 Unified glare rating . 88
8.4 Colour rendering and colour appearance . 88
8.5 Luminaire luminance. 88
8.6 Maintenance schedule . 88
8.7 Tolerances in measurements . 89
8.8 System tests . 89
Annex A (informative) Recommended practice regarding implementation of UGR tabular
method for ‘non-standard’ situations .90
Annex B (informative) Additional information on visual and non-visual effects of ocular light
exposure .92
Annex C (informative) Lighting design considerations – Examples .99
Annex D (informative) Commissioning .106
B
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