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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. b! R, o7 g" u" a' i
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
+ k. K0 K( c% [7 ? qof Solid-State Lighting Products5 s# b6 ?3 _7 ^* k) w; f, z/ K
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。/ I( g) ~( `7 @3 E+ ]
第二个是 79流明光效测试报告。LM79整灯的吧。
V! s4 ^9 \; y: t tThe 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).1 y; M: a9 O$ _7 m+ M0 S$ y
% i: u! R" @! A9 g9 @6 q4 V. ]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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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.4 o% E' W/ z& V0 k2 U3 c
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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.
; r( d9 l. M/ ]2 mQ:寿命L-70是啥
: X7 k# v. B+ d4 i. }" |A:维持70%光通量的寿命 l/ k, }/ j' K! ?- f- h2 P. ~
Q:谢谢。学到东西了
# j Z. _$ L, MA: 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
' c; T9 s6 Q5 RQ:明白了. g9 s6 C' g0 F* O9 O1 {
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发表于 2018-6-29 10:47:25
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