IEC 63013:2017 pdf free download LED packages – Long-term luminous and radiant flux maintenance projection
1 Scope
This document is applicable to LED packages for general lighting services.
lt specifies procedures and conditions for measuring the luminous flux maintenance of LEDpackages. lt also provides the procedures and conditions (criteria) of projecting the long-termluminous flux maintenance based on limited luminous flux maintenance test data collected.Within the context of this document,wherever luminous flux measurement data is specified,radiant flux measurement data can also be used.
These projection methods employ data collected as per ANSIIES LM-80-15(LM-80).
The long-term projection is based on the exponential-fit-function procedure of lES TM-21-11(TM-21), and gives an alternative border function procedure in the case where theexponential-fit-function of IES TM-21-11 is not applicable.
2Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document. For dated references,only the editioncited applies. For undated references, the latest edition of the referenced document (includingany amendments) applies.
IEC 62504,General lighting – Light emitting diode (LED) products and related equipment -Terms and definitions
IES TM-21-11，Projecting Long Term Lumen Maintenance of LED Light Sources
IES LM-80-08 1，IES Approved Method for Measuring Lumen Maintenance of LED Lightsources
ANSI/IES LM-80-15,lES Approved Method: Measuring Luminous Flux and Color Maintenanceof LED Packages, Arrays and Modules
3Terms and definitions
For the purposes of this document,the terms and definitions given in lEC 62504 and thefollowing apply.
So and lEC maintain terminological databases for use in standardization at the followingaddresses:
.IEC Electropedia: available at http://www.electropedia.orgl
. ISO Online browsing platform: available at http://www.iso.org/obp
3.1
case temperature
temperature value of the thermocouple attachment point as specified by the manufacturer
4Test method, data collection and sample size
Luminous flux maintenance test data shall be collected according to the methods described inANSIIES LM-80-15.Test data collected according to lES LM-80-08 shall be acceptable.
When collecting data for long-term luminous flux maintenance projection, it is recommendedto use intervals smaller than 1 000 h for the measurement of the luminous flux and to performmeasurements beyond 6 000 h.
Recommendations on sample size are found in lES TM-21-11.
5 Long-term luminous flux maintenance projection methods
5.1 General
The following projection methods are included in this document:.Exponential fit function(EFF)
.Border function (BF)
The EFF method shall be used as the primary method，with the BF method used as analternative only when the EFF calculation yields a negative or zero a-value,see Annex B(Flowchart).
lf at least one temperature data set leads to the application of the BF method (a ≤ 0), then alltemperature data sets of the same LED package shall be evaluated with the BF method.
Annex A describes a temperature acceleration method according to the temperatureacceleration Arrhenius (TA-A) formula.
5.2Exponential fit function(EFF)5.2.1 Method
The exponential fit function method(EFF), as described in IES TM-21-11，is based on theassumption that after early luminous flux degradation modes are complete，the subsequenttest data can be fitted and extrapolated using an exponential curve-fit function，using theformula
IEC 63013:2017 pdf free download
