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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
& Z/ k( @; i7 j( w/ fIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 V. a, m- b! T/ C; z0 t' R
of Solid-State Lighting Products
& v6 R% I6 C1 T: U- R' dA: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。; D5 X2 G1 S5 |! _) N: t9 T/ w" {* ~/ R% n
第二个是 79流明光效测试报告。LM79整灯的吧。
, n. _% E: K9 H4 ^8 rThe 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).
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/ X) |- n1 V3 }3 `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.0 A+ c ^+ l0 q8 o d; E1 G* e
. ~, h" V9 Y5 ?8 r, CLM80, 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.8 p1 U( |5 m9 J" l
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LM80 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.0 P; C' |( U; ~
Q:寿命L-70是啥9 F" G6 y0 D* C& _3 u+ W& M& s
A:维持70%光通量的寿命
% g# I- [" k0 b7 P! @Q:谢谢。学到东西了" Q8 W" \) d1 ^/ ~
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
" A! f) S( d# T) x% j/ T4 B |3 _+ NQ:明白了( Y7 M% D, m9 v
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发表于 2018-6-29 10:47:25
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