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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
4 i6 R' W9 ^; M _IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements: p8 {' W5 J+ R; H
of Solid-State Lighting Products% i3 s' R( s2 P
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。
7 j$ ~2 i+ B; L6 i第二个是 79流明光效测试报告。LM79整灯的吧。
% } z+ i( S1 WThe 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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" Q% d8 }' O$ A" n' CL70 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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2 M8 v9 {! W N( a1 DLM79, 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.7 O% N, H) s5 H9 k6 \1 y
5 [$ {7 B/ p5 P# M6 p! q9 YLM80, 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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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.
! f+ n( G1 h# s# n2 TQ:寿命L-70是啥
6 J4 F \% L) Q! }* x) l/ k4 M2 GA:维持70%光通量的寿命
& I2 y5 t3 S3 Y; T( P5 D3 hQ:谢谢。学到东西了
. P: J' O# S1 A& \# U, D2 j5 dA: 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
: X+ A1 b) ^; U# yQ:明白了' |' ]0 x" V, S, J& X( p
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发表于 2018-6-29 10:47:25
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