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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3 |, v$ ~- l. O9 V/ S" h: y
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
+ s H' f& _0 U6 m" E- Qof Solid-State Lighting Products
) `: I( Y+ [# e9 F: LA: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。
$ p: O: P& J) o8 v. A6 C ?第二个是 79流明光效测试报告。LM79整灯的吧。
4 P( D" d; l7 l7 bThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?1 z$ {2 n" X9 M
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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).
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* _3 ~; d+ C$ c* q6 K- RLM79, 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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( V* R" v S$ g" G' g& NLM80, 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., c5 x$ h: C. `
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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.
5 i$ t9 t- ]0 t7 w8 |/ S* QQ:寿命L-70是啥. i; @. T1 L5 A/ g0 O% D
A:维持70%光通量的寿命
7 ]2 ?; r. b L2 O, dQ:谢谢。学到东西了
0 `& l! l; u; @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
, q( `' \7 O& [Q:明白了8 t4 S. ^! ^* F$ D* s
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发表于 2018-6-29 10:47:25
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