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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3 a* w4 G& j$ O" d) g$ `$ A
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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。
' G: t7 O+ X# D4 `& X! d第二个是 79流明光效测试报告。LM79整灯的吧。
$ \# ? M2 l3 `& h& c7 hThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?- |- J3 |, W: r% Q
, y- t% B7 A S( j( G# fL70 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).! O$ _' o+ x" n- k; M C
( P' n/ H4 V4 n# W3 p9 yLM79, 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.% q6 q( P: Y' i* o0 y5 E
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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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2 Q% d; L, K2 s1 e/ G. qLM80 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./ [/ d. g* V( H3 c2 a4 w' u
Q:寿命L-70是啥( U* D4 T0 V0 j& N
A:维持70%光通量的寿命
6 \% ^4 O# X% D4 pQ:谢谢。学到东西了
% U h- n9 r3 p/ }( D" Y% UA: 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4 A% M' h: [8 r% d5 K& p
Q:明白了
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发表于 2018-6-29 10:47:25
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