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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
5 @; l$ y- ^1 n" e- pIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements }- x2 S) n _( U: p# |
of Solid-State Lighting Products7 ~0 W& b/ b y- f; O
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。
' H" f6 g3 X, }( J( i) L$ r第二个是 79流明光效测试报告。LM79整灯的吧。% x; X3 ^2 j/ o* f* b
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?/ L/ ?. ?' H2 |; M* u8 r% y' Q" a
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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).: S6 A( G, c7 l$ V- y
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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.6 q' \+ q2 R) c- P( n% [/ D4 s
! j/ }$ X5 T7 _ w4 E3 L9 LLM80, 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., |2 t: P/ Z6 A1 ^+ D- K: r
' O" L& l: `3 W% |: X4 l9 LLM80 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 q6 J$ D U4 W5 F. y' f3 g( U4 @Q:寿命L-70是啥
( g3 Q2 O( ^& } {- `A:维持70%光通量的寿命$ G' x0 A3 k4 A) H9 x [' B
Q:谢谢。学到东西了
. V! z$ m; d+ e/ dA: 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# H! z& }! n1 k/ s- q8 L
Q:明白了
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发表于 2018-6-29 10:47:25
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