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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
2 B5 ?! p4 }% Q- V% SIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
6 N% Y+ H2 ]5 ?% c, G7 |* h" Xof Solid-State Lighting Products Z0 b5 Z' V' z, A4 |: s$ {) j: B
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。
7 v, V! ~! q Y' o/ v9 j第二个是 79流明光效测试报告。LM79整灯的吧。8 d) ~$ K4 V ~# r4 Q/ n
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?3 R6 W- `$ M' W
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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).) i) g& m" |; n; p' ?8 K9 S
3 H. U( E5 t3 u7 i6 o1 D# wLM79, 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.7 k2 H. A! j9 J
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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.! q9 r$ x! }( B, t" m. d7 Z4 j
J. F' g7 K( pLM80 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.
( h3 h3 Z( B% L1 H0 a- OQ:寿命L-70是啥
/ ?% \9 p6 e( o; h1 tA:维持70%光通量的寿命
$ ^3 D) b5 C# ^" v* h8 q! p/ SQ:谢谢。学到东西了
5 s) E A8 c) V. |# HA: 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
- R) r/ X- M3 }Q:明白了
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发表于 2018-6-29 10:47:25
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