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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
, k/ D7 |: L- DIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements8 p# j b. {2 U& D$ ~) g% ?* w
of Solid-State Lighting Products; V3 z% J, n& b8 g; k
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。) q! \7 I4 Y" c; x' |4 i+ M
第二个是 79流明光效测试报告。LM79整灯的吧。7 j& ?' T, R+ ^
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?, D$ [4 Z/ \8 D2 s$ |
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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.' @ _# y# v0 k% r5 N% F5 U
5 V+ A4 T- F. W0 l& s+ mLM80, 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 v) P& B) S( I8 j) O
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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.
# J% }! [# ]# }/ U: w7 P! U: R* FQ:寿命L-70是啥
# X9 e9 _* B# F' W0 _4 `) HA:维持70%光通量的寿命3 k1 C" C/ M6 l8 _+ ^$ A
Q:谢谢。学到东西了
1 y* I$ }) A) {. x# Z; W( mA: 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
' I; `) c+ T1 ^Q:明白了
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发表于 2018-6-29 10:47:25
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