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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: L$ d& D# ?6 v: W; z
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements+ D# c' M! r5 ?* p) f; T5 U
of Solid-State Lighting Products
6 T7 Z$ s$ C0 ]1 p* x/ s! ?2 T4 h: XA: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。/ Q- x! M9 F$ g! K3 w y
第二个是 79流明光效测试报告。LM79整灯的吧。
$ C0 o/ s9 ^, v" uThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?8 F4 m- u3 n/ d* t ^
+ J" L0 F, H8 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).
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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.
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7 z2 L! s/ p' K6 B2 ~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.# U# b+ M9 ^6 r
Q:寿命L-70是啥
! N/ P- k: I4 R9 [; w' [4 ZA:维持70%光通量的寿命/ e9 `6 j0 h- A5 U" D+ E* Q
Q:谢谢。学到东西了
7 i. z8 g0 h$ u" ?! qA: 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 R% v) x& P; X0 l IQ:明白了6 E4 T& C. }& D% v5 K) K
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发表于 2018-6-29 10:47:25
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