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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
1 M9 m. U4 c/ q5 tIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements7 L) Y, t% c" O" j8 F) ^
of Solid-State Lighting Products# @/ R( X+ |+ x) z$ Q4 \' B
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。
9 P! L. E5 L& ^ H# A第二个是 79流明光效测试报告。LM79整灯的吧。
; R- v$ m% L4 R* [ z( NThe 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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8 w, H6 t5 Z. `, `# q7 w) f6 J- 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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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.6 b8 f% c" I7 T+ ?; k* G
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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.- w! P) f( q& q: m: Y
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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.
; R% |" C: O0 c" h" |, k7 [Q:寿命L-70是啥& z! \8 x* `* e3 f7 I! L) ]
A:维持70%光通量的寿命
* j' ^/ \4 Q- L) l* PQ:谢谢。学到东西了; w. h2 B% l6 P
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! ~ M3 k s: t
Q:明白了
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发表于 2018-6-29 10:47:25
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