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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$ S- X, `% ?& m/ M2 l, }
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements& t2 ]: \0 q% ^9 O/ I: a
of Solid-State Lighting Products7 M0 L( V* v8 i5 j5 s) I$ U
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。
0 a# u4 N$ c" t9 n7 M第二个是 79流明光效测试报告。LM79整灯的吧。
, ^5 D: t O2 G+ n& r6 {4 {* ^- ~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?
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" n" h3 W0 s! U6 S2 P# O/ eL70 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).
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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.
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( Q6 w, S# v1 sLM80 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.
6 r& P0 F- K* f# @9 _Q:寿命L-70是啥
" B; G! I; }% X3 O; q' xA:维持70%光通量的寿命 \# y) a' w# V( J- `
Q:谢谢。学到东西了' o' T5 R/ ^ a. b+ w9 Y/ n
A: 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3 s5 ?" c! M3 ?/ Z# h; h7 ?6 c$ r
Q:明白了
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发表于 2018-6-29 10:47:25
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