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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/ W5 |6 b5 S9 w; `! j5 k$ _
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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2 f k$ W, B' X8 E; I1 b3 ^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。
' ^% i* z# E8 O$ k% x' c第二个是 79流明光效测试报告。LM79整灯的吧。/ I8 Y( Z# _( p* F- R/ V! j' ]
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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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).0 U* S' q6 X& Y M: ~3 e' W
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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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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 V6 Y- E5 d7 J/ W% ?! N
/ e5 t5 y! P# Q; S' xLM80 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.0 {# h4 X, P0 U. M
Q:寿命L-70是啥% N: e/ a. k% H" L7 p8 g1 y
A:维持70%光通量的寿命
* b; ^9 j+ H6 L. u8 C4 ^& W" j' bQ:谢谢。学到东西了
$ U; ~# w3 K. ^3 BA: 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
$ T& o1 F+ E7 Y. `Q:明白了6 ]: ?2 `7 I* `% e+ S
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发表于 2018-6-29 10:47:25
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