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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 T! ]" f% V( _4 \IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements- G, y+ p6 g: @ P3 A: |
of Solid-State Lighting Products9 N8 r$ W. `! T; Q+ S# z* `
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。
4 d7 \: x) [+ Q第二个是 79流明光效测试报告。LM79整灯的吧。
9 C. j: s: m/ a. L) @% x, L1 _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?3 x; Y y+ b" f
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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).8 U: T2 C# Q- R0 w% e
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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.& H5 W7 Q! v' f3 ] [7 w/ }; M! f" v
# `: [- I9 t5 `3 u% Q* fLM80, 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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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 t* I5 y' }0 n5 a6 u; B, YQ:寿命L-70是啥
9 a. t) U, K) k! ?3 U: H; bA:维持70%光通量的寿命/ R+ k. T* m8 b( `; L
Q:谢谢。学到东西了; O; Z9 t8 P4 h
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
/ O' s6 i r$ _6 J n( ?Q:明白了
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发表于 2018-6-29 10:47:25
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