IEC PAS 62717:2011

IEC/PAS 62717 ®
Edition 1.0 2011-04
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
LED modules for general lighting – Performance requirements

IEC/PAS 62717:2011(E)
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.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
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.
 Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
 IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
 Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
 Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC/PAS 62717 ®
Edition 1.0 2011-04
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
LED modules for general lighting – Performance requirements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
X
ICS 29.140.99 ISBN 978-2-88912-476-3

– 2 – PAS 62717  IEC:2011(E)
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 9
4 Marking . 12
4.1 Mandatory marking . 12
4.2 Additional marking . 13
5 Dimensions . 14
6 Test conditions . 14
6.1 General test conditions . 14
6.2 Creation of module families to reduce test effort . 15
6.2.1 General . 15
6.2.2 Variations within family . 15
6.2.3 Compliance testing of family members . 16
7 Module power . 16
8 Light output . 17
8.1 Luminous flux . 17
8.2 Luminous intensity distribution, peak intensity and beam angle . 17
8.2.1 General . 17
8.2.2 Measurement. 17
8.2.3 Luminous intensity distribution . 17
8.2.4 Peak intensity value* . 18
8.2.5 Beam angle value* . 18
8.3 Efficacy . 18
9 Chromaticity co-ordinates, correlated colour temperature (CCT) and colour
rendering . 18
9.1 Chromaticity co-ordinates . 18
9.2 Correlated colour temperature (CCT) . 19
9.3 Colour rendering index (CRI) . 19
10 LED module life . 20
10.1 General . 20
10.2 Lumen maintenance . 20
10.3 Endurance tests . 22
10.3.1 General . 22
10.3.2 Temperature cycling test . 22
10.3.3 Supply switching test . 23
10.3.4 Accelerated operation life test . 23
11 Verification . 23
12 Information for luminaire design . 24
Annex A (normative) Method of measuring LED module characteristics . 25
Annex B (informative) Information for luminaire design . 28
Annex C (informative) Explanation of recommended life time metrics . 29
Annex D (normative) Explanation of the photometric code . 34
Annex E (informative) Meaning of confidence intervals . 35

PAS 62717  IEC:2011(E) – 3 –
Annex F (informative) Examples of LED dies and LED packages . 38
Annex G (informative) Optimised test duration for future consideration . 40
Bibliography . 42

Figure 1 – Types of LED modules . 7
Figure 2 – Luminous flux depreciation over test time. 22
Figure C.1 – Life time specification for gradual light output degradation . 30
Figure C.2 – Life time specification for abrupt light output degradation . 31
Figure C.3 – Reliability curve R for gradual light output degradation . 32
gradual
Figure C.4 – Reliability curve R for abrupt light output degradation . 32
abrupt
Figure C.5 – Combined R and R degradation . 33
gradual abrupt
Figure E.1 – t-distribution with right sided confidence interval (1-α) . 36
Figure F.1 – Schematic drawings of LED dies . 38
Figure F.2 – Schematic drawings of LED packages . 39

a
Table 1 – Mandatory marking and location of marking . 13
Table 2 – LED module life time information . 13
Table 3 – Optional marking and location of marking . 14
Table 4 – Allowed variations within family . 15
Table 5 – Tolerance (categories) on rated chromaticity co-ordinate values . 19
Table 6 – Lumen maintenance code at an operational time as stated in 6.1 . 20
Table 7 – Sample sizes . 24
Table C.1 – Recommended x and y values for life time metrics to be used in life time
specification . 33
Table E.1 – Values of the t-distribution . 37

– 4 – PAS 62717  IEC:2011(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
LED MODULES FOR GENERAL LIGHTING –
PERFORMANCE REQUIREMENTS
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.
A PAS is a technical specification not fulfilling the requirements for a standard, but made
available to the public.
IEC/PAS 62717 has been prepared by subcommittee 34A: Lamps, of IEC technical committee
34: Lamps and related equipment.
This PAS was approved for
The text of this PAS is based on
publication by the P-members of
the following document:
the committee concerned as
indicated in the following document
Draft PAS Report on voting
34A/1444/PAS 34A/1462/RVD
Following publication of this PAS, which is a pre-standard publication, the technical committee
or subcommittee concerned may transform it into an International Standard.

PAS 62717  IEC:2011(E) – 5 –
This PAS shall remain valid for an initial maximum period of 3 years starting from the
publication date. The validity may be extended for a single period up to a maximum of 3
years, at the end of which it shall be published as another type of normative document, or
shall be withdrawn.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – PAS 62717  IEC:2011(E)
INTRODUCTION
This first edition of a performance PAS for LED modules for general lighting applications
acknowledges the need for relevant tests for this new source of electrical light, sometimes
called “solid state lighting”. The publication is closely related to simultaneously developed and
edited performance standards publications (or PAS) for luminaires in general and for LED-
luminaires. Changes in the LED module PAS will have an impact on the luminaire standards
and vice versa, due to the behaviour of LEDs. Therefore, in the development of the present
PAS, a close collaboration of experts on both products has taken place.
The provisions in the PAS represent the technical knowledge of experts from the fields of the
semiconductor (LED chip) industry and of those of the traditional electrical light sources.
Three types of LED-modules are covered: with integral controlgear, with means of control on
board, but with separate controlgear (“semi-ballasted”), and with complete external
controlgear.
PAS 62717  IEC:2011(E) – 7 –
LED MODULES FOR GENERAL LIGHTING –
PERFORMANCE REQUIREMENTS
1 Scope
This PAS specifies the performance requirements for LED modules, together with the test
methods and conditions, required to show compliance with this PAS.
The following types of LED modules are distinguished (see Figure 1):
– Type 1: Self-ballasted LED modules for use on d.c. supplies up to 250 V or on a.c.
supplies up to 1 000 V at 50 Hz or 60 Hz;
– Type 2: LED modules operating with external controlgear connected to the mains voltage,
and having further control means inside (“semi-ballasted”) for operation under constant
voltage, constant, current or constant power;
– Type 3: LED modules where the complete controlgear is separate from the module for
operation under constant voltage, constant current or constant power.
‘LED module’
Electronic
control gear LEDs
‘Self-ballasted LED module (Type 1)’’
‘Electronic control
gear for LED modules’
‘LED module’
Power supply
Control unit of
LEDs
of the control
the control gear
gear
‘Semi-ballasted LED module (Type 2)’
LED modules with
external control gear
‘Electronic control
gear for LED modules’
‘LED module’
Electronic
LEDs
control gear
‘Non-ballasted LED module (Type 3)’

The power supply of the controlgear for semi-ballasted LED modules (Type 2) is an electronic device capable of
controlling currents, voltage or power within design limits.
The control unit of the controlgear for semi-ballasted LED modules (Type 2) is an electronic device to control the
electrical energy to the LED’s.
A LED module with external controlgear can be either a non-ballasted LED module or a semi-ballasted LED
module.
Figure 1 – Types of LED modules
The requirements of this PAS relate only to type testing.
Recommendations for whole product testing or batch testing are under consideration.
This PAS covers LED modules that intentionally produce white light, based on inorganic
LEDs.
These performance requirements are additional to the requirements in IEC 62031 safety
standard for LED modules.
Electrical supply system
– 8 – PAS 62717  IEC:2011(E)
Life time of LED modules is in most cases much longer than the practical test times.
Consequently, verification of manufacturer’s life time claims cannot be made in a sufficiently
confident way, because projecting test data further in time is not standardised. For that
reason, the acceptance or rejection of a manufacturers life time claim, past 25 % of rated life
(with a maximum of 6 000 h), is out of the scope of this PAS.
Instead of life time validation, this PAS has opted for lumen maintenance codes at a defined
finite test time. Therefore, the code number does not imply a prediction of achievable life time.
The categories are lumen-depreciation character categories showing behaviour in agreement
with manufacturer’s information which are provided before the test is started.
In order to validate a life time claim, an extrapolation of test data is needed. A general method
of projecting measurement data beyond limited test time is under consideration.
The pass/fail criterion of the life time test as defined in this PAS is different from the life time
metrics claimed by manufacturers. For explanation of recommended life time metrics, see
Annex C.
NOTE 1 When modules are operated in a luminaire, the claimed performance data can deviate from the values
established via this PAS due to e.g. luminaire components that impact the performance of the module.
NOTE 2 The external electronic controlgears for LED modules as mentioned in Type 2 and Type 3 are not part of
the testing against the requirements of this PAS.
NOTE 3 For protection for water and dust ingress, see Clause B.4.
It may be expected that self-ballasted LED modules which comply with this PAS will start and
operate satisfactorily at voltages between 92 % and 106 % of rated supply voltage. LED
modules with external controlgear are expected to start and operate satisfactorily in
combination with the specified controlgear complying with IEC 61347-2-13 and IEC 62384. All
LED modules are expected to start and operate satisfactorily when operated under the
conditions specified by the module manufacturer and in a luminaire complying with
IEC 60598-1.
For compliance with EMC requirements, reference is made to regional requirements. For
relevant standards, see Bibliography.
NOTE It should be regarded that only those types of LED modules are subject to EMC requirements which
– in case of harmonic current are directly connected to the mains and have active elements on board;
– in case of radiated or conducted disturbances are directly connected to the mains (Type 1) or to a battery;
– in case of immunity are directly connected to the mains (Type 1) or to a battery.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60050-845, International Electrotechnical Vocabulary – Part 845: Lighting
IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 60081:1997, Double-capped fluorescent lamps – Performance specifications
IEC 60598-1, Luminaires – Part 1: General requirements and tests
IEC/TR 61341, Method of measurement of centre beam intensity and beam angle(s) of
reflector lamps
PAS 62717  IEC:2011(E) – 9 –
IEC 61347-2-13, Lamp controlgear – Part 2-13: Particular requirements for d.c. or a.c.
supplied electronic controlgear for LED modules
IEC 62031:2008, LED modules for general lighting – Safety specifications
IEC 62384, DC or AC supplied electronic control gear for LED modules – Performance
requirements
IEC/TS 62504, General lighting – LED and LED modules – Terms and definitions
CIE 13.3:1995 (CD008-1995 included), Method of measuring and specifying colour rendering
properties of light sources
CIE 121:1996, The photometry and goniophotometry of luminaires
CIE 177:2007, Colour rendering of white LED light sources
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-845 and
IEC/TS 62504 apply, together with the following.
3.1
rated value
quantity value for a characteristic of a LED module for specific operating conditions
The value and the conditions are specified in this PAS, or assigned by the manufacturer or
responsible vendor.
3.2
test voltage, current or power
input voltage, current or power at which tests are carried out
3.3
lumen maintenance
value of the luminous flux at a given time in the life of a LED module divided by the initial
value of the luminous flux of the module and expressed as a percentage x of the initial
luminous flux value
NOTE The lumen maintenance of a LED module is the effect of decrease of lumen output of the LED(s) or a
combination of this with failure(s) of LED(s) if the module contains more than one LED.
3.4
initial values
photometric and electrical characteristics at the end of the ageing period and/or stabilisation
time
3.5
maintained values
photometric and electrical characteristics at an operational time as stated in 6.1, including
stabilisation time
– 10 – PAS 62717  IEC:2011(E)
3.6
rated life
length of time during which a population of LED modules provides more than claimed
percentage x of the initial luminous flux, published in combination with the failure fraction, as
declared by the manufacturer or responsible vendor
NOTE 1 For sample size, see Clause 6.
NOTE 2 Note 2 and Note 3 of 3.7 apply.
NOTE 3 For explanation of the figure L F , see Annex C.
x y
3.7
life (of an individual LED module)
L
x
length of time during which a LED module provides more than claimed percentage x of the
initial luminous flux, under standard conditions
NOTE 1 A LED module has thus reached its end of life, when it no longer provides claimed percentage x of the
initial luminous flux. Life is always published as combination of life (L ) at lumen maintenance x and failure fraction
x
F , see 3.8.
y
NOTE 2 Any built-in electronic controlgear, however, may show a sudden end of life failure. The definition under
3.7 implies that a LED module giving no light at all, due to an electronic failure, has actually reached end of life,
since it no longer complies with the minimum luminous flux level as declared by the manufacturer or responsible
vendor.
3.8
failure fraction
F
y
percentage y of a number of LED modules of the same type that at their rated life designates
the percentage (fraction) of failures
NOTE 1 This failure fraction expresses the combined effect of all components of a module including mechanical,
as far as the light output is concerned. The effect of the LED could either be less light than claimed or no light at
all.
NOTE 2 For LED modules, normally a failure fraction of 10 % or/and 50 % are being applied, indicated as F
and/or F .
3.9
photometric code*
colour designation of a LED module giving white light is defined by the correlated colour
temperature and the CIE 1974 general colour rendering index
* Under consideration
NOTE Definition of photometric code is given in IEC/TS 62504 as light colour designation.
3.10
stabilisation time
time which the LED module requires to obtain stable photometric conditions with constant
electrical input
NOTE LED modules may be regarded stable at stable thermal conditions.
3.11
ageing
preconditioning period of the LED module
3.12
type
LED module, representative of the production

PAS 62717  IEC:2011(E) – 11 –
3.13
family
group of LED modules that have
– the same method of control and operation (self-ballasted, semi-ballasted, non-ballasted);
– the same classification according to the method of installation (reference is made to
IEC 62031, Clause 6);
– the same class of protection against electrical shock;
– the same design characteristics, distinguished by common features of materials,
components, and/or method of processing
3.14
type test
conformity test on one or more LED modules, representative of the production
3.15
type test sample
one or more LED modules submitted by the manufacturer or responsible vendor for the
purpose of the type test
3.16
t -point
p
the designated location of the point where to measure the performance temperatures t and t
p p
at the surface of the LED module
max
3.17
t temperature
p
temperature at the t -point, related to the performance of the LED module
p
NOTE 1 t ≤ t . This is only the case if the location of t and t is the same. For t , see 3.10 of IEC 62031.
p c p c c
NOTE 2 The location of t and t can be different, but the value of t is leading.
p c c
NOTE 3 For a given life time, the t temperature is a fixed value, not a variable.
p
NOTE 4 There can be more than one t , depending on the life time claim.
p
3.18
recommended maximum LED module operating temperature value

t
p max
maximum t temperature as declared by the manufacturer or responsible vendor
p
NOTE 1 t ≤ t . This is only the case if the location of t and t is the same. For t , see 3.10 of IEC 62031.
p max c p max c c
NOTE 2 The location of t and t can be different, but the value of t is leading.
p max c c
3.19
semi-ballasted LED module
module which carries the control unit of the controlgear, and is operated by the separated
power supply of the controlgear
NOTE In this standard, semi-ballasted LED modules are designated “Type 2”.
3.20
control unit of the controlgear
electronic device, being part of the controlgear, responsible for controlling the electrical
energy to the LEDs as well as colour mixing, response to depreciating luminous flux and
further performance features
NOTE In semi-ballasted LED modules, the control unit of the controlgear is on board the module and separate
from the power supply of the controlgear.

– 12 – PAS 62717  IEC:2011(E)
3.21
power supply of the controlgear
electronic device, being part of the controlgear, capable of controlling current, voltage or
power within design limits. This device contains no additional LED control capabilities.
NOTE 1 For semi-ballasted LED modules, the power supply of the controlgear is separate from the LED module
on a distant location.
NOTE 2 The energy source of a power supply can be either a battery or the electrical supply system.
3.22
LED module efficacy
quotient of the luminous flux emitted by the power consumed by the LED module
NOTE The efficacy is expressed in lm/W.
3.23
LED die
block of semi-conducting material on which a given functional circuit is fabricated
NOTE For a schematic built-up of a LED die, see Figure F.1.
3.24
LED package
assembly of one or more LED-dies, possibly with optical element and thermal, mechanical,
and electrical interfaces
The device does not include the control unit of the controlgear, does not include an IEC
standardised lamp cap, and is not connected directly to the mains.
NOTE A LED package is a discrete component and part of the LED module. For a schematic built-up of a LED
package, see Figure F.2.
4 Marking
4.1 Mandatory marking
Information on the parameters shown in Table 1 shall be provided by the manufacturer or
responsible vendor and be located as described.
The information shall be related to the maximum performance operating temperature t ,
p max
except for the t -point (item j), the dimensions (item n) and the availability of a heat sink
p
(item o).
NOTE This information is in addition to the mandatory marking required by IEC 62031.
For scaleable modules, refer to 6.1 and mark the reference dimensions in the leaflet.

PAS 62717  IEC:2011(E) – 13 –
a
Table 1 – Mandatory marking and location of marking
(x = required, - = not required)
Parameters Product Packaging Product datasheets,
leaflets or website
Rated luminous flux (lm) - x x
d
Photometric code (See Annex D) - x x
Rated life (h) and the associated rated lumen maintenance (x) - x x
Failure fraction (F ), corresponding to the rated life - x x
y
Lumen maintenance code (see Table 6) - - x
Rated chromaticity co-ordinate values both initial and maintained - - x
(see Table 5)
Correlated colour temperature (K) - - x
Rated Colour Rendering Index - - x
c b
t of LED module (°C) x - x
p max
c
t -point x  x
p
Ageing time (h), if different to 0 h - - x
Ambient temperature range - - x
Efficacy (lm/W) - - x
Dimensions, including dimensional tolerances - - x
Availability of a heat sink - - x
a
Regional requirements may apply and overrule.
b
If the space on the module is not large enough, marking on the packaging only is sufficient.
c
In case t and t are at the same location, then t is not marked separately on the module, but given in the product
p c p max
datasheet.
d
Under consideration.
4.2 Additional marking
If the module does not have an own heat sink, the module manufacturer shall provide this
information.
For built-in and integral LED modules with or without heat management means, the relations
between at least 3 temperatures at the t -point including recommended t according to
p p max
Table 1 and each estimated life time may be provided by the manufacturer or responsible
vendor. See Table 2 as an example.
For independent LED modules, the relations between at least 3 ambient temperatures
including 25 °C and each estimated life time may be provided by the manufacturer or
responsible vendor. See Table 2 as an example.
Table 2 – LED module life time information
t temperature (°C) measured at the t -point XX * XX * XX *
p p
Rated life time (h) XX XXX* XX XXX* XX XXX*
* values to be declared by the LED module manufacturer.

– 14 – PAS 62717  IEC:2011(E)
NOTE 1 Additional information from the LED module manufacturer to the tabled t temperatures and life time is
p
allowed. For the chosen life time, t is a fixed value.
p
NOTE 2 Verification is currently not covered by this PAS.
In addition to 4.1, the marking as given in Table 3 may be used.
Table 3 – Optional marking and location of marking
(x = required, - = not required)
Parameters Product Packaging Product datasheets,
leaflets or website
Luminous intensity distribution - - x
Beam angle - - x
Peak intensity - - x
5 Dimensions
All of the tested items in a sample shall be within the dimensional tolerances as declared by
the manufacturer or responsible vendor.
Compliance is checked by inspection.
6 Test conditions
6.1 General test conditions
Testing duration is 25 % of rated life time up to a maximum of 6 000 h.
NOTE Additional LED modules within the same family (see 3.13) may be subjected to decreased testing duration.
For identification of a family, see Table 4, for details on sample sizes for family testing, see Table 7.
Test conditions for testing electrical and photometric characteristics, lumen maintenance and
life are given in Annex A.
All tests are conducted on “n” LED modules of the same type. The number “n” shall be a
minimum of products as given in Table 7. LED modules used in the endurance tests shall not
be used in other tests.
In case of Type 2 and Type 3 LED modules, testing requires operation with an external
reference power supply and reference controlgear, respectively. Specification of the reference
power supply and reference controlgear shall be made by the LED module manufacturer or
responsible vendor.
LED modules with dimming control shall be adjusted to maximum output for all tests.
LED modules with adjustable colour point shall be adjusted / set to one fixed value as
indicated by the manufacturer or responsible vendor.
LED modules which are scaleable, e.g. modules of linear geometry, but very long length, shall
be tested at a length of 50 cm or, if not scaleable there, at the nearest value to 50 cm. The
module manufacturer shall indicate which controlgear is suitable for this length.

PAS 62717  IEC:2011(E) – 15 –
6.2 Creation of module families to reduce test effort
6.2.1 General
The introduction of family aims to guide LED module manufacturers towards to platform
designs thus to allow the possibility to use data of the existing baseline product that had
already been tested at an operational time as stated in 6.1. The baseline product is
considered to be the first LED module complying this PAS and designated to be part of the
family.
6.2.2 Variations within family
Each family of LED modules requires a case-by-case consideration. The range of LED
modules should be manufactured by the same manufacturer, under the same quality
assurance system. The type variations of the range (e.g. CCT) should be essentially identical
with respect to materials used, components and construction applied. Type test sample(s)
should be selected with the cooperation of the manufacturer and the testing station.
Requirements for the identification of a family of LED modules for type testing are given in
definition 3.13 and used in Table 4.
Testing time may be reduced within family for 1 000 h (see Note 3) in case variations within
part characteristics are fulfilled with conditions given in Table 4.
Table 4 – Allowed variations within family
Part characteristics intended to Conditions for acceptance
be varied
Housing/chassis, Temperature measurement point value of LED package (location and its
value given by the LED module supplier) and other components remains the
heat sink/heat management
same value as indicated and specified by the manufacturer or responsible
vendor (see also Note 1 of this subclause).
Optics (see NOTE 2) The test results showing the effect of optical material change shall be
documented in the manufacturer’s technical file.
LED package t remains at the same value as indicated and specified by the manufacturer
p
or responsible vendor (see also Note 1 of this subclause).
Controlgear t remains at the same value as indicated and specified by the manufacturer
p
(Applicable for Type 1 or Type 2 or responsible vendor.
LED modules) A statistical failure rate calculation based on a MTBF calculation by
manufacturer must show equal or lower failure rate of the electronic
controlgear.
NOTE 1 The value of t can be used as long as the correlation between the temperature measurement value of
p
LED and t is defined (process under consideration).
p
NOTE 2 Optics includes for instance secondary optics (lenses), reflectors, trim and gasket and their
interconnections. The results should relate to changes in luminous flux, luminous peak intensity, luminous intensity
distribution, beam angle, shift in colour co-ordinates, shift in CCT and shift in CRI.
NOTE 3 Value under consideration.
NOTE 4 Any change on part tolerances is documented in the manufacturer’s technical file.

– 16 – PAS 62717  IEC:2011(E)
6.2.3 Compliance testing of family members
The following performance characteristics of members within a family at initial and after
reduced testing time shall be in line with the values provided by the responsible manufacturer
or vendor of the module:
– chromaticity co-ordinates,
– colour rendering index,
– lumen maintenance code,
– results of acceleration operated life test.
Documentation of data shall be provided to the testing station in manufacturer’s technical file.
Compliance is checked as follows:
For all of the tested items in a sample, the measured values of a LED module (the initial and
maintained value) shall not move beyond the values as indicated by the manufacturer or
responsible vendor. The measured values shall be of the same category or code as the
provided values or better. All the LED modules in a sample shall pass the test.
7 Module power
Measurements are conducted under the most adverse condition. For conditions, see Annex A.
Compliance is checked as follows:
The initial power consumed by each individual LED module in the measured sample shall not
exceed the rated power by more than 10 %.
The 97,5 %* one-sided upper confidence limit for the sample mean of power shall not exceed
110 % of the rated power value.
The 97,5 %* upper confidence limit for sample size n according Table 7 is calculated by the
formula:
S
X+ (t ⋅ )
n−1;0,975
n
where X , S and n are the sample average, standard deviation and number of LED modules
respectively and t is the t-statistic for a 97,5 % confidence limit for n-1 degrees of
n-1, 0,975
freedom.
* Under consideration; in discussion: 95 % one-sided confidence interval.
NOTE 1 Note 2 of Clause 1 should be regarded.
NOTE 2 For sample sizes, see calculations in Annex E.

PAS 62717  IEC:2011(E) – 17 –
8 Light output
8.1 Luminous flux
Luminous flux is measured according to Annex A.
Compliance is checked as follows:
The initial luminous flux of each individual LED module in the measured sample shall not be
less than 90 % of the rated lumen output.
The 97,5 %* one-sided lower confidence limit for the sample mean of luminous flux shall
exceed 90 % of the rated luminous flux value.
The 97,5 %* lower confidence limit for sample size n according Table 7 is calculated by the
formula:
S
X− (t ⋅ )
n−1;0,975
n
where X , S and n are the sample average, standard deviation and number of LED modules
respectively and t is the t-statistic for a 97,5 % confidence limit for n-1 degrees of
n-1; 0,975
freedom.
* Under consideration; in discussion: 95 % one-sided confidence interval.
NOTE 1 For sample sizes, see calculations in Annex E.
8.2 Luminous intensity distribution, peak intensity and beam angle
8.2.1 General
The requirements of 8.2.4 and 8.2.5 are to be applied to LED modules having a directional
(spot) distribution.
NOTE Luminous intensity distribution of a LED module may be specific for an application.
8.2.2 Measurement
The intensity of light emitted from the LED module in different directions is measured using a
goniophotometer. All photometric data shall be declared for the LED module operating at its
temperature t per Clause A.1.
p
NOTE The allowed photometric variations detailed are to take account of manufacturing tolerances.
8.2.3 Luminous intensity distribution
The distribution of luminous intensity shall be in accordance with that declared by the
manufacturer.
Compliance is under consideration.

– 18 – PAS 62717  IEC:2011(E)
8.2.4 Peak intensity value*
Where a peak intensity value is provided by the manufacturer or responsible vendor, the initial
peak intensity of each individual LED module in the measured sample shall not be less than
75 % of the rated intensity.
Compliance is checked according to Annex A.
* Average value and confidence level are under consideration.
8.2.5 Beam angle value*
Where a beam angle value is provided by the manufacturer or responsible vendor, the beam
angle value of each individual LED module in the measured sample shall not deviate by more
than 25 % of the rated value.
Compliance is checked according to Annex A.
* Average value and confidence level are under consideration.
8.3 Efficacy
LED module efficacy shall be calculated from the measured initial luminous flux of the
individual LED module divided by the measured initial input power of the same individual LED
module.
Compliance is checked as follows:
For all tested items in a sample, the LED module efficacy shall not be less than 90 % of the
rated LED module efficacy as declared by the manufacturer of responsible vendor.
9 Chromaticity co-ordinates, correlated colour temperature (CCT) and colour
rendering
9.1 Chromaticity co-ordinates
The initial chromaticity co-ordinates are measured. A second measurement of maintained
chromaticity co-ordinates is made at an operational time as stated in 6.1. The measured
actual chromaticity co-ordinate values (both initial and maintained) shall fit within one of 4
categories (see Table 5), which correspond to a particular MacAdams ellipse around the rated
chromaticity co-ordinate value, whereby the size of the ellipse (expressed in n-steps) is a
measure for the tolerance or deviation of an individual LED module.
Compliance is checked as follows:
For compliance of family members, refer to 6.2.3.
For all of the tested items in a sample, the measured chromaticity co-ordinate values of a LED
module (the initial value and maintained value) shall not move beyond the chromaticity co-
ordinate tolerance category as indicated by the manufacturer or responsible vendor (see
Table 5). The measured values shall be of the same category as the rated values or better.
The sample items for the chromaticity coordinate measurement shall be selected from four
different batches*.
PAS 62717  IEC:2011(E) – 19 –
Table 5 – Tolerance (categories) on rated chromaticity co-ordinate values
Colour variation category
Size of MacAdam ellipse, centred
on the rated colour target
initial maintained
3-step 3 3
5-step 5 5
7-step 7 7
7+ 7+
>7-step ellipse
The behaviour of the chromaticity co-ordinates of a LED module shall be expressed by stating
the two measurement results of both initial chromaticity
...