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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2 i6 e, B- b6 W2 m& P# V& C
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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, ?' `" {3 d' K+ FA: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。- s: x3 K( ]4 Y
第二个是 79流明光效测试报告。LM79整灯的吧。4 X* d* P3 L. B, h* R$ Y! X
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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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 |$ x h9 G; G
7 Z/ u; M, n8 q( ?7 xLM79, 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.$ n- Q/ `: [! \8 n" ^
! b+ m6 Z0 A& E# iLM80, 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.2 n; \- x% [3 I* h9 ~( a: p% f3 A
" c7 K& I& e8 V% X2 d; iLM80 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.. A- M9 Y( j0 y0 C1 M3 \# ~4 u3 ]
Q:寿命L-70是啥- c2 {' _3 I, y5 A6 `
A:维持70%光通量的寿命5 x: a a, e' A/ Q0 h
Q:谢谢。学到东西了- i/ r0 L2 F+ c1 u: 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3 t9 K K/ k* J
Q:明白了
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发表于 2018-6-29 10:47:25
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