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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
0 ]5 J( a0 S% IIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements+ k" W o4 i" a9 s7 z9 I
of Solid-State Lighting Products
0 g8 C% i- w% y+ |: r; }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。3 J8 {( L- P! J" L V
第二个是 79流明光效测试报告。LM79整灯的吧。
" D0 j3 V _; N2 s5 ]6 V' ?. E" B5 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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/ {) L5 c. n0 |! G `! W& [+ UL70 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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- [8 s1 i& A3 I$ N% 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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) e- C' U: x5 b, H' c0 \! f3 |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.
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6 ^; F9 S9 B- X/ Q+ L1 J8 @; q }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.& ]6 O9 w) v* a5 f, ~6 q
Q:寿命L-70是啥$ X, a/ j3 Q& G O8 O7 \3 }
A:维持70%光通量的寿命 ^3 O$ `8 j" V" M( u
Q:谢谢。学到东西了
# r( v' C( K, N; f" t" F$ W2 KA: 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
( d: A& L C: j% V- b7 \# T- m3 QQ:明白了! x+ C1 A3 X& u- N4 v% a
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发表于 2018-6-29 10:47:25
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