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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
: q- c6 R6 u) o$ J$ m% TIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements+ c' c7 M1 l" s! B9 |( @, V
of Solid-State Lighting Products" B2 | R5 f$ V! O5 z
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。( ^# U. _; H2 i. I) x
第二个是 79流明光效测试报告。LM79整灯的吧。
* d$ `+ k( J2 |9 ?" U _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?4 U# i- c; |; R4 M5 O
- Z" ?# G0 S# j9 _0 XL70 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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$ _: R# c2 d# s! ?. T0 E2 @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.! m0 ~8 a" b/ r- N- G5 G% I6 Y
! @5 `! C B8 R' s& o1 g9 MLM80, 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.
: @: _% k; j5 Q2 D2 R a/ PQ:寿命L-70是啥+ G0 O1 n" p6 l) c! X+ S3 P6 w% C
A:维持70%光通量的寿命0 P; Z d) E8 z% c; U
Q:谢谢。学到东西了3 ?# z! D( o9 E3 h# F
A: 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, T0 |6 O6 g( R k5 G9 x
Q:明白了; |* I- u" z+ p3 T1 Z/ O# x0 m6 ?
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发表于 2018-6-29 10:47:25
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