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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
, p' h! y$ B, o: f# ]0 WIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements: _0 Q7 h# |: d, o ~
of Solid-State Lighting Products
6 k& m, O8 v5 Q% _! K% x9 ?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。 \5 v) e3 T7 b
第二个是 79流明光效测试报告。LM79整灯的吧。
& w8 U% h% F& y- U# lThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?* d( i5 J& v0 a4 I" G2 Z. Y
9 K7 j3 X& z+ f" h" p; 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.! T1 `9 G! ?8 x x! K" Z
! Y$ y& j5 E# \& N$ E( aLM80 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 {. `9 a# t4 Q+ Y: b
Q:寿命L-70是啥
+ U) [6 }% i* O# eA:维持70%光通量的寿命: F( Y- E* k) t+ q5 J) [0 Y4 h
Q:谢谢。学到东西了8 V$ }! k( O i
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
" g5 g# \: r1 s" ?5 pQ:明白了' n2 c& u5 W' w- V2 `
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发表于 2018-6-29 10:47:25
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