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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0 `" j! K, S5 h) B+ b
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements' D4 L }/ V! i4 a% }$ C
of Solid-State Lighting Products
' \! t; {+ g+ v) Z! D/ U! @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。 V7 E3 ^1 {5 ?% U
第二个是 79流明光效测试报告。LM79整灯的吧。 M2 x1 j+ q; P
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?
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$ R. [6 F$ m$ QL70 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).2 O& L4 h: D7 L
: l" {2 c; O- a5 Z' ^- OLM79, 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.
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- C ?. L: g3 Q \0 h& h# kLM80 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.% Q/ T" U' d9 o" R; E& ?; ?
Q:寿命L-70是啥, ?6 u) M/ I# s, ~* t6 \
A:维持70%光通量的寿命
6 C# g. o' k0 m- m+ xQ:谢谢。学到东西了
5 g* @' t3 f- z/ q% pA: 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
8 A w+ {/ ]4 G3 ~& Q3 d8 OQ:明白了+ y8 x1 \' U5 U# Y7 J. s$ U
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发表于 2018-6-29 10:47:25
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