SIST EN 4828:2023
(Main)Aerospace series - Thermal drift of LED luminaires - Classification and measuring methods
Aerospace series - Thermal drift of LED luminaires - Classification and measuring methods
This document defines terms, measuring methods and setting(s) for the classification of the thermal behaviour of LED and OLED luminaires in the aircraft cabin regarding chromaticity and luminance. This document is intended for luminaires that are designed to provide photopic vison.
Luft- und Raumfahrt - Thermische Drift von LED Leuchten - Klassifizierung und Messmethoden
(No Scope Available)
Série aérospatiale - Dérive thermique des luminaires à LED - Classification et méthodes de mesure
Le présent document définit les termes, et spécifie les méthodes et paramètres de mesure pour la classification du comportement thermique des luminaires à LED et OLED de la cabine d’aéronef en matière de caractéristiques de chromaticité et de brillance. Ce document est destiné aux luminaires qui sont conçus pour délivrer une vision photopique.
Aeronavtika - Toplotni premik LED-svetilk - Razvrstitev in merilne metode
Ta dokument določa terminologijo, merilne metode in nastavitve za razvrstitev toplotnega obnašanja LED- in OLED-svetilk v letalski kabini v zvezi z barvnostjo in svetilnostjo. Namenjen je za svetilke, ki zagotavljajo fotopično vidnost.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 4828:2023
01-februar-2023
Aeronavtika - Toplotni premik LED-svetilk - Razvrstitev in merilne metode
Aerospace series - Thermal drift of LED luminaires - Classification and measuring
methodsLuft- und Raumfahrt - Thermische Drift von LED Leuchten - Klassifizierung und
Messmethoden
Série aérospatiale - Dérive thermique des luminaires à LED - Classification et méthodes
de mesureTa slovenski standard je istoveten z: EN 4828:2022
ICS:
29.140.99 Drugi standardi v zvezi z Other standards related to
žarnicami lamps
49.095 Oprema za potnike in Passenger and cabin
oprema kabin equipment
SIST EN 4828:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------SIST EN 4828:2023
---------------------- Page: 2 ----------------------
SIST EN 4828:2023
EN 4828
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 17.180.20; 29.140.99; 49.095
English Version
Aerospace series - Thermal drift of LED luminaires -
Classification and measuring methods
Série aérospatiale - Dérive thermique des luminaires à Luft- und Raumfahrt - Thermische Drift von LED
LED - Classification et méthodes de mesure Leuchten - Klassifizierung und Messmethoden
This European Standard was approved by CEN on 22 August 2022.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4828:2022 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
SIST EN 4828:2023
EN 4828:2022 (E)
Contents Page
European foreword ...................................................................................................................................................... 3
Introduction .................................................................................................................................................................... 4
1 Scope .................................................................................................................................................................... 5
2 Normative references .................................................................................................................................... 5
3 Terms and definitions ................................................................................................................................... 5
4 Classification references .............................................................................................................................. 7
4.1 General................................................................................................................................................................ 7
4.2 Reference temperature ................................................................................................................................ 7
4.3 Reference chromaticity coordinates ........................................................................................................ 8
5 Classification categories ............................................................................................................................... 8
5.1 Luminous flux classification ....................................................................................................................... 8
5.2 Chromaticity classification .......................................................................................................................... 9
6 Labelling of the luminaire............................................................................................................................ 9
7 Operating the light unit .............................................................................................................................. 10
7.1 General.............................................................................................................................................................. 10
7.2 Installation orientation .............................................................................................................................. 10
7.3 Temperature settings .................................................................................................................................. 11
7.4 Power supply .................................................................................................................................................. 11
8 Light measurement ...................................................................................................................................... 11
8.1 General.............................................................................................................................................................. 11
8.2 Measurement method ................................................................................................................................. 11
8.3 Measurement devices .................................................................................................................................. 11
8.4 Determination of the start value ............................................................................................................. 12
Annex A (normative) MacAdam ellipses and interpolation ......................................................................... 13
A.1 General.............................................................................................................................................................. 13
A.2 Example ............................................................................................................................................................ 14
Bibliography ................................................................................................................................................................. 18
---------------------- Page: 4 ----------------------SIST EN 4828:2023
EN 4828:2022 (E)
European foreword
This document (EN 4828:2022) has been prepared by the Aerospace and Defence Industries Association
of Europe — Standardization (ASD-STAN).After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2023, and conflicting national standards shall be
withdrawn at the latest by May 2023.Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, Republic of North Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.---------------------- Page: 5 ----------------------
SIST EN 4828:2023
EN 4828:2022 (E)
Introduction
Since LEDs are very susceptible to thermal changes, the chromaticity and luminous flux of an LED
luminaire are affected by both its own and its ambient temperature. Variations in temperature can result
in variations of luminous flux and chromaticity that in turn can negatively influence the quality of
illumination. An example of this is visible differences in chromaticity and luminance of adjacent
luminaires.These differences depend on the utilized LED types and can be compensated to a certain extent by
electronic means within the device.By introducing a measurement method, the functional link between temperature variation and thermal
drift of chromaticity and luminous flux in aircraft applications can be quantified. The aim of this method
is to ensure a homogenous appearance of LED light units by considering thermal effects.
---------------------- Page: 6 ----------------------SIST EN 4828:2023
EN 4828:2022 (E)
1 Scope
This document defines terms and specifies measuring methods and settings for the classification of the
thermal behaviour of LED and OLED luminaires in the aircraft cabin regarding chromaticity and
brightness characteristics. This document is intended for luminaires that are designed to provide
photopic vison.2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 13032-4, Light and lighting — Measurement and presentation of photometric data of lamps and
luminaires — Part 4: LED lamps, modules and luminaires3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
ISO Online browsing platform: available at https://www.iso.org/obp/IEC Electropedia: available at https://www.electropedia.org/
3.1
chromaticity
colour valences that only differ in luminance
3.2
chromaticity coordinate
two-dimensional data representation of the colour in the corresponding colour space, e.g. x and y for the
CIE 1931[SOURCE: EN 4706:2019, 3.6]
3.3
CIE 1931 colour space
description of a two-dimensional colour space for light colours
Note 1 to entry: In the CIE 1931 diagram the colour coordinates x and y describe the chromaticity locus in the
diagram. For this document the CIE 1931 2° observer is applicable.Note 2 to entry: CIE 015 provides more information about the CIE 1931 colour space.
[SOURCE: EN 4706:2019, 3.5]3.4
colour space
description model to define colours in a two-dimensional (colour without intensity, e.g. xy space
CIE 1931) or three-dimensional space, (colour and intensity, e.g. Yxy CIE 1931)[SOURCE: EN 4706:2019, 3.3]
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SIST EN 4828:2023
EN 4828:2022 (E)
3.5
illuminance
measure of the total luminous flux incident on a surface, per unit area
Note 1 to entry: The unit is lx.
3.6
LED luminaire
device based on LEDs as light source including optics, electronics and cooling equipment enclosed in a
housing[SOURCE: EN 4706:2019, 3.4]
3.7
light emitting diode
LED
solid state device embodying a p-n junction, emitting optical radiation when excited by an electric current
Note 1 to entry: The term LED in the following context includes organic LED (OLED).
[SOURCE: EN 4706:2019, 3.1 modified — Note 1 to entry has been added.]3.8
MacAdam ellipse
area in the corresponding colour space (e.g. CIE 1931) in which all colours have the same visual
impression to an observer as the colour in the centre of this areaNote 1 to entry: The borderline of the ellipse represents the just noticeable colour difference. Based on
experimental data, originally 25 MacAdam ellipses were defined in the CIE 1931 colour space. In the experiment an
observer had a given colour and was able to modify the chromaticity locus of a second colour. The chromaticity loci,
where the observer determined a difference between the two colours were recorded. When all these points were
plotted in the CIE 1931 diagram, they created an ellipse around the chromaticity locus of the given colour. The size
and the orientation of the ellipses are different for different colours.[SOURCE: MacAdam, D.L.]
3.9
organic light emitting diode
OLED
organic solid state device embodying a p-n junction, emitting optical radiation when excited by an electric
current[SOURCE: EN 4706:2019, 3.2]
---------------------- Page: 8 ----------------------
SIST EN 4828:2023
EN 4828:2022 (E)
3.10
standard deviation of colour matching
SDCM
metric of the difference between chromaticities at photopic light level, that describes approximately the
perceptual distance between two chromaticity loci as a multiple of the MacAdam ellipses for these
chromaticity lociNote 1 to entry: n SDCM means that the distance between the two chromaticity loci is n-times the radius of the
appropriate MacAdam ellipse in that direction. The centre of the ellipse is given by the chromaticity locus of the
reference colour. Two chromatici...
SLOVENSKI STANDARD
oSIST prEN 4828:2021
01-junij-2021
Aeronavtika - Toplotni premik LED-svetilk - Razvrstitev in merilne metode
Aerospace series - Thermal drift of LED luminaires - Classification and measuring
methodsLuft- und Raumfahrt - Thermische Drift von LED Leuchten - Klassifizierung und
Messmethoden
Série aérospatiale - Dérive thermique des luminaires à LED - Classification et méthodes
de mesureTa slovenski standard je istoveten z: prEN 4828
ICS:
29.140.99 Drugi standardi v zvezi z Other standards related to
žarnicami lamps
49.095 Oprema za potnike in Passenger and cabin
oprema kabin equipment
oSIST prEN 4828:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------oSIST prEN 4828:2021
---------------------- Page: 2 ----------------------
oSIST prEN 4828:2021
DRAFT
EUROPEAN STANDARD
prEN 4828
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2021
ICS 29.140.99; 49.095
English Version
Aerospace series - Thermal drift of LED luminaires -
Classification and measuring methods
Série aérospatiale - Dérive thermique des luminaires à Luft- und Raumfahrt - Thermische Drift von LED
LED - Classification et méthodes de mesure Leuchten - Klassifizierung und Messmethoden
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4828:2021 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
oSIST prEN 4828:2021
prEN 4828:2021 (E)
Contents Page
European foreword ...................................................................................................................................................... 3
Introduction .................................................................................................................................................................... 4
1 Scope .................................................................................................................................................................... 5
2 Normative references .................................................................................................................................... 5
3 Terms and definitions ................................................................................................................................... 5
4 Classification references .............................................................................................................................. 7
4.1 General................................................................................................................................................................ 7
4.2 Reference temperature ................................................................................................................................ 7
4.3 Reference colour coordinates .................................................................................................................... 7
5 Classification categories ............................................................................................................................... 8
5.1 Flux classification ........................................................................................................................................... 8
5.2 Chromaticity classification .......................................................................................................................... 9
6 Labelling of the luminaire............................................................................................................................ 9
7 Operating the light unit .............................................................................................................................. 10
7.1 General.............................................................................................................................................................. 10
7.2 Installation orientation .............................................................................................................................. 10
7.3 Temperature settings .................................................................................................................................. 11
7.4 Power supply .................................................................................................................................................. 11
8 Light measurement ...................................................................................................................................... 11
8.1 General.............................................................................................................................................................. 11
8.2 Measurement method ................................................................................................................................. 11
8.3 Measurement devices .................................................................................................................................. 11
8.4 Determination of the start value ............................................................................................................. 12
Annex A (normative) MacAdam ellipses and interpolation ......................................................................... 13
A.1 General.............................................................................................................................................................. 13
A.2 Example ............................................................................................................................................................ 14
Bibliography ................................................................................................................................................................. 17
---------------------- Page: 4 ----------------------oSIST prEN 4828:2021
prEN 4828:2021 (E)
European foreword
This document (prEN 4828:2021) has been prepared by the Aerospace and Defence Industries
Association of Europe – Standardization (ASD-STAN).After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.This document is currently submitted to the CEN Enquiry.
---------------------- Page: 5 ----------------------
oSIST prEN 4828:2021
prEN 4828:2021 (E)
Introduction
Colour and light output of a LED lighting device are influenced by its own and environmental
temperature. Variations in temperature can result in variations of light output and chromaticity which
in turn can negatively influence the quality of illumination. Especially when using LED operated light
units, there can be clearly visible differences in chromaticity and luminance of adjacent fixtures as LEDs
are very susceptible to thermal changes.These differences depend on the utilized LED types and can be compensated to a certain extent by
electronic means within the device.By introducing a measurement method, the functional link between temperature variation and thermal
drift of chromaticity and luminance in aircraft applications can be quantified. The aim of this method is
to ensure a homogenous appearance of LED light units by considering thermal effects.
---------------------- Page: 6 ----------------------oSIST prEN 4828:2021
prEN 4828:2021 (E)
1 Scope
This document defines terms, measuring methods and setting(s) for the classification of the thermal
behaviour of LED and OLED luminaires in the aircraft cabin regarding chromaticity and luminance. This
document is intended for luminaires that are designed to provide photopic vison.2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 13032-4, Light and lighting — Measurement and presentation of photometric data of lamps and
luminaires — Part 4: LED lamps, modules and luminaires3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at https://www.electropedia.org/• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
chromaticity
colour valences that only differ in luminance
3.2
chromaticity coordinate
two-dimensional data representation of the colour in the corresponding colour space, e. g. x and y for
the CIE 1931[SOURCE: EN 4706:2019, definition 3.6]
3.3
CIE 1931 colour space
description of a two-dimensional colour space for light colours
Note 1 to entry: In the CIE 1931 diagram the colour coordinates x and y describe the chromaticity locus in the
diagram. For this document the CIE 1931 2° observer is applicable.Note 2 to entry: CIE 015 provides more information about the CIE 1931 colour space.
[SOURCE: EN 4706:2019, definition 3.5]3.4
colour space
description model to define colours in a two-dimensional (colour without intensity, e. g. xy space
CIE 1931) or three-dimensional space, (colour and intensity, e. g. Yxy CIE 1931)[SOURCE: EN 4706:2019, definition 3.3]
---------------------- Page: 7 ----------------------
oSIST prEN 4828:2021
prEN 4828:2021 (E)
3.5
illuminance
measure of the total luminous flux incident on a surface, per unit area
Note 1 to entry: The unit is lx.
3.6
LED luminaire
device based on LEDs as light source including optics, electronics and cooling equipment enclosed in a
housing[SOURCE: EN 4706:2019, definition 3.4]
3.7
light emitting diode
LED
solid state device embodying a p-n junction, emitting optical radiation when excited by an electric
currentNote 1 to entry: The term LED in the following context includes organic LED (OLED).
[SOURCE: EN 4706:2019, definition 3.1 modified]3.8
MacAdam ellipse
area in the corresponding colour space (e. g. CIE 1931) in which all colours have the same visual
impression to an observer as the colour in the centre of this areaNote 1 to entry: The borderline of the ellipse represents the just noticeable colour difference. Based on
experimental data, originally 25 MacAdam ellipses were defined in the CIE 1931 colour space. In the experiment
an observer had a given colour and was able to modify the chromaticity locus of a second colour. The chromaticity
loci, where the observer determined a difference between the two colours were recorded. When all these points
were plotted in the CIE 1931 diagram, they created an ellipse around the chromaticity locus of the given colour.
The size and the orientation of the ellipses are different for different colours.
[SOURCE: MacAdam, D.L.]3.9
organic light emitting diode
OLED
organic solid state device embodying a p-n junction, emitting optical radiation when excited by an
electric current[SOURCE: EN 4706:2019, definition 3.2]
---------------------- Page: 8 ----------------------
oSIST prEN 4828:2021
prEN 4828:2021 (E)
3.10
standard deviation of colour matching
SDCM
metric of the difference between chromaticities at photopic light level, that describes approximately the
perceptual distance between two chromaticity loci as a multiple of the MacAdam ellipses for these
chromaticity lociNote 1 to entry: n SDCM means that the distance between the two chromaticity loci is n-times the radius of the
appropriate MacAdam ellipse in that direction. The centre of the ellipse is given by the chromaticity locus of the
reference colour. Two chromaticity loci on opposite points of the MacAdam ellipse have a distance of (2 n) SDCM.
The SDCM calculation between two chromaticity loci may be non-linear, dependent on the selected colour space.
Therefore distances are limited to less than 10...
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