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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 J8 y2 _; B' N8 ^7 w" Q8 p5 Z7 H
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
* f6 o8 Y6 Y" A% {: z. \/ J! Y3 z% Tof Solid-State Lighting Products
4 o' Y3 y5 Y' A4 c9 Y4 ZA: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' ^ J/ O2 p3 f: M第二个是 79流明光效测试报告。LM79整灯的吧。
. h {( I: y# U+ WThe 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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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.# A8 E5 E0 x5 U
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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.9 T2 d- ^- ^; o! ^
& t1 |4 G4 M- \1 v5 o: A4 S2 TLM80 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.* b+ V9 T" \7 ^$ I' J' Z
Q:寿命L-70是啥5 P r% o8 J4 o2 k
A:维持70%光通量的寿命
: g: h% U, J, n, BQ:谢谢。学到东西了
2 l" n+ M3 {+ F& S* F3 JA: 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# x, V! f* _0 U& U3 p6 x5 J' A
Q:明白了 }+ F! Y. e) D) Y1 j# x) ~
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发表于 2018-6-29 10:47:25
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