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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 H C5 q) J2 }$ PIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
) i# u3 V% O' o, R' ]) Aof Solid-State Lighting Products
2 c- c! X/ z" UA: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。; c& \9 `2 V6 M# ?
第二个是 79流明光效测试报告。LM79整灯的吧。5 D2 Y; G* V5 e ]$ a
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?( ?" s P: s' I' F4 k
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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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, D" V% [7 A4 ^& v4 I xLM79, 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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" h& Q* b& J) e; d& s/ c: `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./ ~2 G7 j( ~9 \5 h r8 B* B! D1 }
) ~/ k! j; w6 V! ]# a+ xLM80 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.. l1 ]& k2 C0 f5 _+ ?+ Z
Q:寿命L-70是啥
; [! X( h& h# VA:维持70%光通量的寿命. a, Z$ d5 a I% h9 S! }/ ~
Q:谢谢。学到东西了
* @; q) \+ Z+ w. W' mA: 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
$ g# S) p: b4 [' V$ r, G: u( l9 ZQ:明白了" V7 o7 j+ r- o' `' s6 \4 O
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发表于 2018-6-29 10:47:25
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