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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3 Y t5 L) M: W% J/ E" k' }
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements. n8 J" C3 A7 C' K" M
of Solid-State Lighting Products, D. _2 Z1 w: Y
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。9 G3 P ^# ]) o& E0 R w
第二个是 79流明光效测试报告。LM79整灯的吧。
v- I5 z6 ]. c! {4 |* aThe 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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1 d& [: k2 l; CL70 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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6 L s% V& v' L% f% a0 lLM79, 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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4 v6 r3 X w' A4 l7 ^$ Y0 ILM80, 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.* b+ Z5 o/ k6 {, E2 f2 ?: `5 a
Q:寿命L-70是啥% p$ e' B1 T8 O4 X- P- t
A:维持70%光通量的寿命
" L. N# d0 H# A$ o$ M/ jQ:谢谢。学到东西了8 Z; V0 X' l! e+ v5 @
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
! u) m, F: y! p# A1 o! r* H n- PQ:明白了
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发表于 2018-6-29 10:47:25
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