IEC 62504:2014

General lighting - Light emitting diode (LED) products and related equipment - Terms and definitions

IEC 62504:2014 is of assistance in the common understanding of terms and definitions, relevant for general lighting with LED technology. The terms included are those already available in IEC LED standards or used in manufacturers' literature. This standard provides descriptive terms (like "LED light sources") and measurable terms when modified from IEC 60050-845 (like "colour rendering index"). This first edition cancels and replaces the IEC TS 62504 published in 2011. The significant changes with respect to IEC TS 62504 are as follows:
a) Terms from the International Electrotechnical Vocabulary that have not been modified are deleted;
b) Alignment with the CIE has been done;
c) An introduction has been added.

Eclairage général - Produits à diode électroluminescente (DEL) et équipements associés - Termes et définitions

L'IEC 62504:2014 doit aider à une compréhension partagée des termes et des définitions pertinents concernant l'éclairage général avec la technologie à LED. Les termes inclus sont ceux qui sont déjà disponibles dans les normes IEC relatives aux LED ou utilisés dans les ouvrages de référence des fabricants. La présente norme donne des termes descriptifs (comme "sources lumineuses à LED") et des termes mesurables modifiés par rapport à l'IEC 60050-845 (comme "indice général de rendu des couleurs"). Cette première édition annule et remplace l'IEC TS 62504 parue en 2011. Les améliorations importantes par rapport à l'IEC TS 62504 sont comme suit:
a) Les termes du Vocabulaire International Electrotechnique qui n'ont pas été modifiés ont été supprimés;
b) L'alignement avec la CIE a été réalisé;
c) Une introduction a été ajoutée.

General Information

• Status: Published
• Publication Date: 12-Mar-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.140.20 - Incandescent lamps
• Technical Committee: TC 34 - Lighting
• Drafting Committee: MT 2 - TC 34/MT 2
• Current Stage: PPUB - Publication issued
• Start Date: 30-Jun-2014
• Completion Date: 19-Jun-2014

Relations

• Replaces: IEC TS 62504:2011 - General lighting - LEDs and LED modules - Terms and definitions
• Effective Date: 05-Sep-2023
• Amended By: IEC 62504:2014/AMD1:2018 - Amendment 1 - General lighting - Light emitting diode (LED) products and related equipment - Terms and definitions
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62504 ®
Edition 1.0 2014-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
General lighting – Light emitting diode (LED) products and related equipment –
Terms and definitions
Éclairage général – Produits à diode électroluminescente (LED) et équipements
associés – Termes et définitions

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
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bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
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A propos de l'IEC
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Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

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Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

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Plus de 55 000 entrées terminologiques électrotechniques, en
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en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et
comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus
projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des

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IEC 62504 ®
Edition 1.0 2014-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
General lighting – Light emitting diode (LED) products and related equipment –

Terms and definitions
Éclairage général – Produits à diode électroluminescente (LED) et équipements

associés – Termes et définitions

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 29.140.20 ISBN 978-2-8322-1651-4

– 2 – IEC 62504:2014 © IEC 2014
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
Annex A (informative) Overview of LED products and terms under consideration . 18
A.1 Overview of LED packages . 18
A.2 Overview of systems composed of LED light sources and LED controlgear . 19
A.3 Overview of LED light sources . 20
A.3.1 Examples of retrofit LED lamps – White or coloured light, bulb or
reflector type, with caps according IEC 60061 (as shown in Figures A.3
and A.4) . 20
A.3.2 Examples of LED lamps with new shapes . 20
A.3.3 Examples of LED modules . 20
A.4 Terms under consideration . 21
A.4.1 LED light engine . 21
A.4.2 Chip on board (CoB) . 21
A.5 Schematic of built-in, independent, integral LED module . 22
A.6 LED product tree overview . 22
Bibliography . 24

Figure 1 – Schematic drawing of the chain of thermal resistors . 17
Figure A.1 – Overview of LED packages . 18
Figure A.2 – Overview of systems composed of LED light sources and LED controlgear . 19
Figure A.3 – Examples of retrofit LED lamps . 20
Figure A.4 – Examples of LED lamps with new shapes . 20
Figure A.5 – Examples of LEDni modules . 21
Figure A.6 – Examples of chip on board . 22
Figure A.7 – Schematic of built in, independent, integral modules . 22
Figure A.8 – LED product tree overview . 23

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GENERAL LIGHTING – LIGHT EMITTING DIODE (LED) PRODUCTS
AND RELATED EQUIPMENT – TERMS AND DEFINITIONS

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62504 has been prepared by IEC technical committee 34: Lamps
and related equipment in collaboration with representatives from CIE.
This first edition cancels and replaces the IEC TS 62504 published in 2011.
The significant changes with respect to IEC TS 62504 are as follows:
a) Terms from the International Electrotechnical Vocabulary that have not been modified are
deleted.
b) Alignment with the CIE has been done.
c) An introduction has been added

– 4 – IEC 62504:2014 © IEC 2014
The text of this standard is based on the following documents:
FDIS Report on voting
34/200/FDIS 34/205/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo o
...

IEC 62504 ®
Edition 1.1 2018-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
General lighting – Light emitting diode (LED) products and related equipment –
Terms and definitions
Éclairage général – Produits à diode électroluminescente (LED) et équipements
associés – Termes et définitions

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 21 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC -
Glossaire IEC - std.iec.ch/glossary
webstore.iec.ch/advsearchform
67 000 entrées terminologiques électrotechniques, en anglais
La recherche avancée permet de trouver des publications IEC et en français, extraites des articles Termes et Définitions des
en utilisant différents critères (numéro de référence, texte, publications IEC parues depuis 2002. Plus certaines entrées
comité d’études,…). Elle donne aussi des informations sur les antérieures extraites des publications des CE 37, 77, 86 et
projets et les publications remplacées ou retirées. CISPR de l'IEC.

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Restez informé sur les nouvelles publications IEC. Just Si vous désirez nous donner des commentaires sur cette
Published détaille les nouvelles publications parues. publication ou si vous avez des questions contactez-nous:
Disponible en ligne et aussi une fois par mois par email. [e-mail].

IEC 62504 ®
Edition 1.1 2018-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
General lighting – Light emitting diode (LED) products and related equipment –

Terms and definitions
Éclairage général – Produits à diode électroluminescente (LED) et équipements

associés – Termes et définitions

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.20 ISBN 978-2-8322-5473-8

IEC 62504 ®
Edition 1.1 2018-03
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
General lighting – Light emitting diode (LED) products and related equipment –
Terms and definitions
Éclairage général – Produits à diode électroluminescente (LED) et équipements
associés – Termes et définitions

– 2 – IEC 62504:2014+AMD1:2018 CSV
© IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
Annex A (informative) Overview of LED products and terms under consideration . 18
A.1 Overview of LED packages . 18
A.2 Overview of systems composed of LED light sources and LED controlgear . 19
A.3 Overview of LED light sources . 20
A.3.1 Examples of retrofit LED lamps – White or coloured light, bulb or
reflector type, with caps according IEC 60061 (as shown in Figures A.3
and A.4) . 20
A.3.2 Examples of LED lamps with new shapes . 20
A.3.3 Examples of LED modules . 20
A.4 Terms under consideration . 21
A.4.1 LED light engine .
A.4.2 Chip on board (CoB) .
A.5 Schematic of built-in, independent, integral LED module . 22
A.6 LED product tree overview . 23
Bibliography . 24

Figure 1 – Schematic drawing of the chain of thermal resistors . 17
Figure A.1 – Overview of LED packages . 18
Figure A.2 – Overview of systems composed of LED light sources and LED controlgear . 19
Figure A.3 – Examples of retrofit LED lamps . 20
Figure A.4 – Examples of LED lamps with new shapes . 20
Figure A.5 – Examples of LEDni modules . 21
Figure A.6 – Examples of chip on board .
Figure A.7 – Schematic of built in, independent, integral modules . 22
Figure A.8 – LED product tree overview . 23

© IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GENERAL LIGHTING – LIGHT EMITTING DIODE (LED) PRODUCTS
AND RELATED EQUIPMENT – TERMS AND DEFINITIONS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 62504 edition 1.1 contains the first edition (2014-06) [documents 34/200/FDIS and 34/205/
RVD] and its amendment 1 (2018-03) [documents 34/476A/FDIS and 34/490/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red text.
A separate Final version with all changes accepted is available in this publication.

– 4 – IEC 62504:2014+AMD1:2018 CSV
© IEC 2018
International Standard IEC 62504 has been prepared by IEC technical committee 34: Lamps
and related equipment in collaboration with representatives from CIE.
The significant cha
...