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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
, x! z9 P7 X% G! cIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements7 N% D8 Y9 c O
of Solid-State Lighting Products
) q$ u/ z `* {; t* N: b7 |# y/ PA: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。' J0 W+ }1 V" n
第二个是 79流明光效测试报告。LM79整灯的吧。0 K. u3 }' z9 {9 v
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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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).# v( B; S2 O8 w, n
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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.6 ]( ?: M! j7 u
* g; P3 U: F8 x+ x9 s5 mLM80, 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.& Z5 F. d- F7 Y5 j7 A/ o
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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.
, b3 R$ P" N* ~/ wQ:寿命L-70是啥4 \: ~. q5 S* y
A:维持70%光通量的寿命
. _, v; U* @# U2 f ]Q:谢谢。学到东西了0 ?5 r" E( E X& d/ x; U5 K- E
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& [2 ^ t; B( ]0 c- @" u" ? c
Q:明白了7 m8 ^- L0 X I
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发表于 2018-6-29 10:47:25
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