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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# j* n! d2 K5 T# L7 @
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
5 ~3 H8 L1 [- j8 x# p4 B6 Mof Solid-State Lighting Products
- `1 \" I* X9 D+ d' h! h% lA: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。: s; e. q8 Q$ M9 C9 b Z+ n
第二个是 79流明光效测试报告。LM79整灯的吧。
+ W' v8 W; T( r% s) gThe 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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L70 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).8 q3 Q C' M9 |, P
' |8 Q' Q3 X8 K2 N0 j l/ o: uLM79, 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 C, [% [3 X/ J4 c* M4 G7 n4 A: \
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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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$ |3 Q0 u# c2 c, v! X+ M/ L& FLM80 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.8 X, C9 p+ s5 Z2 v! x
Q:寿命L-70是啥
4 _! M' d4 o1 O* d; {/ Q; n. [( Y: g$ dA:维持70%光通量的寿命
8 Q i, }0 s+ ^* @( D/ H2 u& G5 JQ:谢谢。学到东西了
" C& N1 m. w$ x6 ?, h2 z- T/ x6 L: EA: 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
1 [- S. g9 r8 Y9 P# v9 C# rQ:明白了
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发表于 2018-6-29 10:47:25
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