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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
" g, x3 c2 ]1 J5 tIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
" z, C6 G1 n; P) jof Solid-State Lighting Products
# V5 K& h* R* k2 i9 ~5 RA: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。
) O/ T* w6 Q& r第二个是 79流明光效测试报告。LM79整灯的吧。9 B% \- @- u& m: c5 t0 s- L
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?' _' K" \6 c9 H
1 }" b5 Z- ^1 hL70 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.5 s4 X; L* t( H/ R: W$ X" |- U+ E
9 g" T, c6 b! ?: K% B1 w& ]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.) t; ]1 w3 x4 i# a L$ S
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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.
" Z: @ f4 e! ?3 tQ:寿命L-70是啥/ X# e6 o+ e+ Y
A:维持70%光通量的寿命- n7 M+ c$ x3 C. L; _" h- R
Q:谢谢。学到东西了# W8 G K3 s! ]) s; o6 n/ m2 x
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
z" A4 q! z+ J3 `6 ^' EQ:明白了
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发表于 2018-6-29 10:47:25
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