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Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
- g* H3 Q1 A8 t: l+ oIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
9 q6 @7 d+ `" g/ ^. d5 sof Solid-State Lighting Products. W3 u3 `5 N; E. ^/ k# _2 B
A:那些认证挺像西班牙AENOR的，第一个里面，CE里面的LVD 跟EMC可能有包括。( l! V- C0 [1 P! F6 L+ D1 n
第二个是 79流明光效测试报告。LM79整灯的吧。, o& k) _% o2 T" b& p
The LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?& ~- ^/ Q' }" ?- }( T
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L70 is simply a measure of the time taken for a light source to degrade to 70% of its original output. It is usually measured in hours and usually refers to degradation of total light output ie lumens. As in “my new LED L70 is 123hours” (not a good result, must try harder).3 W7 ?# Z' }+ ?1 ?# D
8 b! D1 u" Y8 y: R4 s) ?LM79, more properly referred to as “LM-79-08” is a Test Method authored by the Illuminating Engineering Society of North America (IESNA) titled “Approved Method: Electrical and Photometric Measurements of Solid-State Lighting Products”. This essentially defines a set of methodologies for laboratory testing of solid state luminaires and other light sources.
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LM80, more properly referred to as “LM-80-08” is also a Test Method authored by the IESNA. It is titled “Approved Method: Measuring Lumen Maintenance of LED Light Sources”. In contrast to LM79 this defines a test method for long-term life testing of component-level LED devices.4 y& Z2 c. S6 K& _3 \
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LM80 is not much use on its own and does not of itself define how to extrapolate lab-measured LED lifetime test data to enable future lifetime prediction. That’s where TM21 comes in. Full name “TM-21-11”, titled “Projecting Long Term Lumen Maintenance of LED Light Sources”, TM21 details how to extrapolate short-term LED component test data to predict future performance.7 {! f! @4 E$ N3 j6 {! f
Q:寿命L-70是啥
1 Z- j* ?2 O8 Z1 _" a: NA:维持70%光通量的寿命
$ t( x3 u* E8 [/ P# _; [Q:谢谢。学到东西了
" F+ W# Q2 h K$ I/ P) W) }* DA: 你这个要的就是一个IES报告，LM79测试报告里面就有，还有IEC里面的60598的测试报告，还有LM80报告，这个报告里面包含了TM21报告的
' _! t& a* y& E+ M8 O8 |; pQ:明白了, \! B: T7 M) H" p. Y
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发表于 2018-6-29 10:47:25
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