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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, s& Y) S7 m# r: g) J
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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6 N2 k' d3 o8 c. W/ {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。$ R: F# H+ H5 ^% ~. U2 X3 W( o: h
第二个是 79流明光效测试报告。LM79整灯的吧。
2 O& \/ B4 f4 J& Y* X8 VThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?3 `) s0 D: _1 r4 I) Y1 A5 L6 K
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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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1 I( p8 H1 R6 v9 `" }& @9 L1 bLM79, 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.
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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.4 c% V( C% y) k
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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.
8 B) d. }( Y' E8 pQ:寿命L-70是啥
6 k9 S a/ h, D. g. T5 TA:维持70%光通量的寿命
& e0 s+ F; O! ]: s9 zQ:谢谢。学到东西了
4 L/ l; ^. J0 {# o. \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
, m8 m* r2 G# z- v/ k7 h( iQ:明白了
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发表于 2018-6-29 10:47:25
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