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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4 J1 F T; A; N ^7 d6 O. t' N& r
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
1 X+ ^% |! J6 n" oof Solid-State Lighting Products
1 `: `. [, T0 g0 e7 W wA: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。
3 D8 A8 V/ F7 W6 Q& Z0 i6 }第二个是 79流明光效测试报告。LM79整灯的吧。
; S8 S- L# e% a) J) D; ]1 ]5 JThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?$ \) S8 h& a+ j
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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).
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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.
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1 {* H% W I3 P; F' p4 xLM80, 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.6 O* s3 W' c- c! Z( f( Y! G
. o; i! |& B ELM80 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.; g7 o- z, t. h2 C. `1 I2 j8 p
Q:寿命L-70是啥 d* W( f2 Z3 i2 T* V
A:维持70%光通量的寿命
1 O: o' q" q# bQ:谢谢。学到东西了' V7 _5 r( X4 M" r
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
+ Q# m( ]% M- C% c: L: ]* QQ:明白了
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发表于 2018-6-29 10:47:25
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