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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
1 H. G. ?7 ~+ F& s/ t/ y$ L- HIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements" Z9 ~$ x. `" P e6 s
of Solid-State Lighting Products1 K# k8 S& x+ B+ O8 F9 ?
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。4 G: C$ C% a" V' A' X: o
第二个是 79流明光效测试报告。LM79整灯的吧。
+ t; s) X6 V ^+ rThe 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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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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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. H) S9 r, W% b; W9 h& J n3 {( c
d7 P* n- k" E5 SLM80, 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., j }& H9 w4 E2 C8 B% t
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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.$ K2 f' H8 V# z1 O# h. y0 K
Q:寿命L-70是啥4 n# D. D/ r2 m( N: P r ~
A:维持70%光通量的寿命
2 a5 A, M: K; G- u6 Y/ d2 dQ:谢谢。学到东西了
4 N D+ U8 g* v N4 ?/ ~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( [& g- M5 x2 R5 S7 D
Q:明白了9 W' _+ J$ B+ Z' B }
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发表于 2018-6-29 10:47:25
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