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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8 d. H. Y( {) A3 T( D
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements$ Y/ W( C2 i4 L* T4 r
of Solid-State Lighting Products' i! T2 V" l% m6 W
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。$ m4 [/ _) A& |- K$ D! l/ X
第二个是 79流明光效测试报告。LM79整灯的吧。& U$ q: N9 U# A
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?4 s2 u/ W( @! C2 m3 u) p/ |
# {$ m5 l& T0 aL70 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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# }' d' Z+ a8 V/ P! gLM79, 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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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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& U* j6 O% c- I3 \3 X: r1 zLM80 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.
1 b" Q: A+ W, H* A8 g# ^0 GQ:寿命L-70是啥
# {4 x# F$ t+ Y$ x9 A4 x0 SA:维持70%光通量的寿命
8 ^5 X" Z' o+ _' l0 DQ:谢谢。学到东西了
" R! B9 |6 t1 W2 O P. i7 b' {, t, [1 k5 rA: 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
/ a. \; r/ Z) pQ:明白了( Y* `+ t0 \' _8 K) _9 E
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发表于 2018-6-29 10:47:25
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