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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7 w+ r6 l* l9 n- y9 G
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements. _. ^6 \: `4 |4 M+ u/ Q% m" M" E! p
of Solid-State Lighting Products
+ P1 B/ o( a3 f, O: {1 C' HA: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" o; G5 o! t第二个是 79流明光效测试报告。LM79整灯的吧。* P. h3 ^! _2 k) O2 Q! }
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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. Y0 I* o# P6 b) O) hL70 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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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.
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2 D# C: n- Z/ {: K& XLM80, 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.9 A/ X8 ]# h, P1 z6 w {, C, b
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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.
# N4 p" n, r) Q' c0 iQ:寿命L-70是啥
- | H+ |% g+ V- |( l$ V+ v; TA:维持70%光通量的寿命8 @! ]. @9 p+ \2 S0 q
Q:谢谢。学到东西了- [. V( X; c/ P
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
" o1 E9 c/ O: `. iQ:明白了
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发表于 2018-6-29 10:47:25
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