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IES TM 21 : 2011

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

PROJECTING LONG TERM LUMEN MAINTENANCE OF LED LIGHT SOURCES

Available format(s)

Hardcopy , PDF

Superseded date

01-10-2019

Superseded by

ANSI/IES TM-21:2019

Published date

01-01-2011

€35.89
Excluding VAT

Introduction
1.0 Scope
2.0 Normative References
3.0 Definitions
4.0 Test Data and Sample Size
5.0 Lumen Maintenance Life Projection
6.0 Temperature Data Interpolation
7.0 Report
Annex A - Rationale for the Recommended Data Extrapolation
Annex B - Sample Size Selection for Data Extrapolation
Annex C - Least Squares Formula
Annex D - Limit for Duration of Prediction
Annex E - Data Test Set for Validation of Calculation - Examples
Annex F - Consideration of Manufacturer's Prediction Model
Annex G - Analysis of Mathematical Modeling as a Method of
          Projecting Lumen Maintenance Life
Informative References

Specifies recommendations for projecting long term lumen maintenance of LED light sources using data obtained when testing them per IES LM-80-08, 'IES Approved Method for Measuring Lumen Maintenance of LED Light Sources.'

DevelopmentNote
Also available in French translation, see IES TM 21 FRENCH. Also available in Spanish translation, see IES TM 21 SPANISH. (10/2017)
DocumentType
Standard
Pages
39
PublisherName
Illuminating Engineering Society
Status
Superseded
SupersededBy

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