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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
* U# a' F9 A! }$ KIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements+ a0 \- c$ U A7 A
of Solid-State Lighting Products
3 a/ A) s" v, M7 M7 I, d& H( W7 m* nA: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。
4 [- ^ ~0 w0 k# M' r) p2 V第二个是 79流明光效测试报告。LM79整灯的吧。3 k# l4 q: y' _- _% N& {7 D( o
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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8 g" a/ a+ G: W& V, F% f. X3 kL70 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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7 h ? D! T0 A. ^/ RLM79, 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.: X6 ~9 q9 F5 j' i
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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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" b G$ N0 D8 C) N4 TLM80 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.
" D. g6 f: \+ l) tQ:寿命L-70是啥
: t8 w# z/ I2 G& `# {A:维持70%光通量的寿命
/ ]% {" m& h, ?: B& H6 TQ:谢谢。学到东西了# a! K" t- H1 s
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
) C6 I+ N# ~9 O h" e9 |Q:明白了
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发表于 2018-6-29 10:47:25
|LED盘
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