IES TM 21 2011
$27.08
IES TM-21 Projecting Long Term Lumen Maintenance of LED Light Sources
Published By | Publication Date | Number of Pages |
IES | 2011 | 33 |
This document recommends a method for projecting the lumen maintenance of LED light sources from the data obtained by the procedures found in IES document LM-80-08 Approved Method for Measuring Lumen Maintenance of LED Light Sources. LED light sources provide a very long usable life but light output gradually depreciates over time. TM-21-11 provides the method for determining when the
PDF Catalog
PDF Pages | PDF Title |
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1 | Cover |
3 | Copyright |
8 | INTRODUCTION 1.0 SCOPE 2.0 NORMATIVE REFERENCES 3.0 DEFINITIONS 4.0 TEST DATA AND SAMPLE SIZE |
9 | 5.0 LUMEN MAINTENANCE LIFE PROJECTION |
10 | 6.0 TEMPERATURE DATA INTERPOLATION |
12 | 7.0 REPORT ANNEX A – RATIONALE FOR THE RECOMMENDED DATA EXTRAPOLATION METHOD |
14 | ANNEX B – SAMPLE SIZE SELECTION FOR DATA EXTRAPOLATION |
15 | ANNEX C – LEAST SQUARES FORMULA ANNEX D – LIMIT FOR DURATION OF PREDICTION |
17 | ANNEX E – DATA TEST SET FOR VALIDATION OF CALCULATION – EXAMPLES |
25 | ANNEX F – CONSIDERATION OFMANUFACTURER’S PREDICTION MODEL |
26 | ANNEX G – ANALYSIS OF MATHEMATICAL MODELING AS A METHODOF PROJECTING LUMEN MAINTENANCE LIFE |
32 | INFORMATIVE REFERENCES |