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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$ z5 G. J; b( _& N A9 M
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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。! [4 B7 @9 `! z, ]
第二个是 79流明光效测试报告。LM79整灯的吧。% N( {/ r, g7 ?% ~( Q& m' a; @8 W
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?. Y0 `) m' Y. `2 A
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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.& u b& i& n& P0 ~* A h% w. W I$ C
4 I9 T# h" p" D3 P. p" \& E: @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.9 z& U. B: L6 s7 c; E3 G8 Y
% M* O8 z* o( N. b- wLM80 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.
a; e0 l; o1 r* s+ H9 L7 PQ:寿命L-70是啥; d5 Z' Y) u& C/ D) W) P
A:维持70%光通量的寿命4 e/ I2 J3 L A: y" `" [: ]$ L: f3 R. d
Q:谢谢。学到东西了' D+ r) z/ ~ n3 Y3 s
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
9 n9 ? m+ z& | ?1 k/ }Q:明白了
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发表于 2018-6-29 10:47:25
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