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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1 l3 `, Z) U( ?" C% ^4 u
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) }) o+ n5 }' x u* z Z
of Solid-State Lighting Products
+ \. c0 Q# h, s, AA: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。
( B! J5 h& I! M a; x" T第二个是 79流明光效测试报告。LM79整灯的吧。0 K& i5 L0 }: H# p
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?3 [% t3 B* b0 M, U X, U
- g6 T- D. ~3 w" rL70 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)./ D, x/ \, D0 A" B
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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.& x/ c. S( a$ G& O
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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.( R, F3 y. s5 K! V2 c
" A7 I1 o5 t' ^6 mLM80 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.
2 s1 Z) h3 [1 R# i" R( T7 nQ:寿命L-70是啥
5 v, D( \) q" N: ]( q# C& _2 }A:维持70%光通量的寿命
8 \5 H2 S* s$ i# M8 ?Q:谢谢。学到东西了7 a; g: h" @) }$ z) v
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
/ [0 C5 B6 c% GQ:明白了
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发表于 2018-6-29 10:47:25
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