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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 a+ P8 {# _* \. e+ e/ x; ?
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 F f6 \, }+ L) }* Q( x9 Z
of Solid-State Lighting Products) q# p9 d9 i* c2 i. e( j
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。
$ z. k/ m5 P+ l: U& A, Z' b9 s+ H第二个是 79流明光效测试报告。LM79整灯的吧。. ~2 L7 h6 f* u
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?
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k' P, s( V2 j" L1 BL70 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.: {& t" z- p+ |
8 t0 a+ g3 C, @9 q: O% vLM80, 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.4 ^: A# ~' o5 l0 p
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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.# o6 P& t$ ?* I: c1 S+ r/ U* l4 }
Q:寿命L-70是啥' }( u# w$ Y0 H+ a3 |
A:维持70%光通量的寿命8 i8 Y+ C8 z. Y% g( E: q: @
Q:谢谢。学到东西了 L- k( Y& s6 D0 Z2 ? G7 i
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
/ Y4 M3 ?1 ^) p# Y0 q3 TQ:明白了
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发表于 2018-6-29 10:47:25
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