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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
6 e' q6 ?! w) ~- V3 m! \* ~IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements* J! w! N5 g5 U2 e6 x
of Solid-State Lighting Products
4 M/ F+ \7 f* e# S8 MA: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。 Z& E6 O z p* }9 F7 o
第二个是 79流明光效测试报告。LM79整灯的吧。
4 I S% H! t3 R7 W; H; sThe 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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$ W) V# c# p( R" F6 EL70 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).7 `9 {0 H4 u& {: i/ u+ p
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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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9 t+ C8 |6 h5 \; L7 T1 lLM80, 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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* c3 d+ h% c* f- ]) @# q* lLM80 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.
( A! O- h5 U, j7 W, A: |" }' dQ:寿命L-70是啥# p( h4 ?7 v" R9 ^* L/ l2 V5 Z
A:维持70%光通量的寿命1 l8 e8 \: K7 d
Q:谢谢。学到东西了0 i Q5 ~! d; T
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
3 g7 p1 D# ?1 M+ r% mQ:明白了
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发表于 2018-6-29 10:47:25
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