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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
9 H1 Y6 j# o9 L) ], R) i5 pIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements+ w5 [' i8 g( E" |9 m( S
of Solid-State Lighting Products
" n5 K L' w8 n. m qA: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。
+ n9 c7 @3 I6 o4 b第二个是 79流明光效测试报告。LM79整灯的吧。7 `$ ]/ Z+ X) U3 t2 [+ Y. f6 G+ D
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?1 d1 U: m$ D) C( _( a, l
1 W& x) o5 Y0 O' I/ b4 O, A2 cL70 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 p. ~" y- t7 ~& \0 _: G& r
5 x; N: W* s/ X1 M Z* ~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.
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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.. i" ?3 b; b. ]. r( _
Q:寿命L-70是啥# L" {- s8 i. f6 s) C0 _9 B+ f7 z% E2 F
A:维持70%光通量的寿命
% i$ v" F) n! E* h& h1 RQ:谢谢。学到东西了
- V$ y. K- d' \- c& AA: 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
a m. H# F5 u) o5 o% \Q:明白了
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发表于 2018-6-29 10:47:25
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