IEC 60050-845:2020

IEC 60050-845 ®
Edition 2.0 2020-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HORIZONTAL PUBLICATION
PUBLICATION HORIZONTALE
International electrotechnical vocabulary (IEV) –
Part 845: Lighting
Vocabulaire électrotechnique international (IEV) –
Partie 845: Éclairage
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IEC 60050-845 ®
Edition 2.0 2020-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HORIZONTAL PUBLICATION
PUBLICATION HORIZONTALE
International electrotechnical vocabulary (IEV) –

Part 845: Lighting
Vocabulaire électrotechnique international (IEV) –

Partie 845: Éclairage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 01.040.01; 29.020; 91.160.01 ISBN 978-2-8322-8015-7

– II – IEC 60050-845  IEC 2020
CONTENTS
FOREWORD . IV
INTRODUCTION Principles and rules followed . VIII
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
Section 21: Radiation, quantities and units . 3
Section 22: Vision, colour rendering . 134
Section 23: Colorimetry. 216
Section 24: Emission, optical properties of materials . 286
Section 25: Radiometric, photometric and colorimetric measurements: physical
detectors . 397
Section 26: Actinic effects of optical radiation . 478
Section 27: Light sources . 545
Section 28: Components of electric light sources and auxiliary apparatus . 631
Section 29: Lighting technology and daylighting . 669
Section 30: Luminaires and their components . 801
Section 31: Visual signalling . 846
Section 32: Imaging . 935
INDEX . 984

IEC 60050-845  IEC 2020 – III –
SOMMAIRE
AVANT-PROPOS . VI
INTRODUCTION Principes d'établissement et règles suivies . XI
1 Domaine d'application . 2
2 Références normatives . 2
3 Termes et définitions . 2
Section 21: Rayonnement, grandeurs et unités . 3
Section 22: Vision, rendu des couleurs . 134
Section 23: Colorimétrie. 216
Section 24: Emission, propriétés optiques des matériaux . 286
Section 25: Mesurages radiométriques, photométriques et colorimétriques: récepteurs
physiques . 397
Section 26: Effets actiniques des rayonnements optiques . 478
Section 27: Sources de lumière . 545
Section 28: Éléments de construction des sources de lumière électriques et appareils
auxiliaires . 631
Section 29: Éclairagisme et lumière du jour . 669
Section 30: Luminaires et leurs éléments de construction . 801
Section 31: Signalisation visuelle . 846
Section 32: Formation d'image . 935
INDEX . 984

– IV – IEC 60050-845  IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_______________
INTERNATIONAL ELECTROTECHNICAL VOCABULARY (IEV) –

Part 845: Lighting
FOREWORD
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International Standard IEC 60050-845 has been prepared jointly by IEC technical committee
34: Lighting, and the CIE (International Commission on Illumination) under the responsibility of
IEC technical committee 1: Terminology.
This second edition cancels and replaces the first edition published in 1987 together with
IEC 60050-845:1987/AMD1:2016, IEC 60050-845:1987/AMD2:2019 and IEC 60050-845:1987/
AMD3:
...