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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
" ^5 y, U# b9 ?IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements. _, ^: r1 ?: a# [" }* _
of Solid-State Lighting Products0 |9 g9 j/ V* F) q2 l! U( 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。
5 C, `, c1 I7 P/ U& S* p- ^8 N第二个是 79流明光效测试报告。LM79整灯的吧。
9 z m# U+ v" o4 P, | s2 g9 }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?" r b* E F: f* a. P
( Z9 n |( q1 h9 l( L- f( YL70 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).7 X/ H) N0 ]* `0 l2 T) c9 K
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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.9 |# K4 b3 E' I
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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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3 t$ J' T5 B4 v. Y. @8 q% q/ jLM80 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.
' n7 m4 w: v- N: OQ:寿命L-70是啥
d0 w7 _. k& K! ?! j" yA:维持70%光通量的寿命
. O A# T( j, jQ:谢谢。学到东西了' I* G1 m* o, n" Y( d
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% O# Z% e+ z$ ]1 H* E
Q:明白了
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发表于 2018-6-29 10:47:25
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