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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
0 D! D/ I7 n! _& V6 B$ k( EIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
. N7 }' G. l4 J8 P. Hof Solid-State Lighting Products
n) t0 {! C% p) _8 T( ~3 sA: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。
( l+ i8 r) Y0 z% @$ [第二个是 79流明光效测试报告。LM79整灯的吧。
/ d% Q, A! G( M) KThe 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).
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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.9 f$ I7 Z0 p" g1 W5 b; |, S5 Y% k! u d
* T; H% Z" U8 p* `6 jLM80, 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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* U$ S3 b$ ^3 n$ @: M- W* a" mLM80 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.
8 @, N4 D) r& M- s: n8 s+ A& bQ:寿命L-70是啥3 w, a5 b7 f+ [+ a5 ?" c7 y; D
A:维持70%光通量的寿命
3 S& U5 l- @7 p' ZQ:谢谢。学到东西了
" o/ @9 u6 s6 @% H. [2 K! m- SA: 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
, L( j1 d H2 FQ:明白了
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发表于 2018-6-29 10:47:25
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