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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6 Y: V8 U6 b; ^- \
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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。 Q6 y, D( d$ E+ H) H* i2 F9 ~* H
第二个是 79流明光效测试报告。LM79整灯的吧。
" B6 ~0 \% s% P/ QThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?% Z2 w3 h( |0 n# t
2 M" A6 M8 l% q7 W9 mL70 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).$ H5 k- y9 P4 X$ s; J7 @& I X
$ J% W1 N) I. B: W0 BLM79, 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.8 s0 Z' u/ y3 X1 _ I1 A$ 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.
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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.* M' l' |) E& w6 k8 q' o! R
Q:寿命L-70是啥$ K% ]6 y1 U4 _- e# l! S3 M# }
A:维持70%光通量的寿命
6 ~3 s5 }) f- t- E7 I3 K- oQ:谢谢。学到东西了 f# m4 K9 X& [- z0 j! Y( _0 Q u
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
9 q& {8 Z9 X) a' T/ M5 t- q1 b& FQ:明白了
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发表于 2018-6-29 10:47:25
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