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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' i9 s1 D+ e) {# a {# C* ~
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements9 k9 {" v0 S7 I* ^( t
of Solid-State Lighting Products
; ]" j- @# i1 ^/ p7 V( v+ NA: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。
/ h( g, d6 i7 P+ A3 H第二个是 79流明光效测试报告。LM79整灯的吧。) x8 t; t) f9 L. A8 c
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).
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9 y5 w/ D4 J7 ?- c. g9 L$ L9 GLM79, 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.$ \8 S$ H& c. x
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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.. S( Y2 y8 j4 p$ }8 N! N: Q& C2 C4 Q
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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.4 ~5 y9 O9 U. l5 Z% W+ C( e
Q:寿命L-70是啥5 e$ R7 }2 o+ H+ c. P- J' @4 J% ?
A:维持70%光通量的寿命' L! c+ n8 x7 q3 S' k9 Y
Q:谢谢。学到东西了
. P! Z7 v6 ~9 T) f- @' c4 \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 l B* [5 ?! `- K1 n6 k
Q:明白了
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发表于 2018-6-29 10:47:25
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