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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6 z* d) D% R) V% Z# p0 y. f) b
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
4 ~. U% O f P3 `& b$ v# W+ x4 Kof Solid-State Lighting Products+ h* r* z/ g: w: t7 F8 {
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。5 |( J: x5 i) t5 ] N, W8 T4 c
第二个是 79流明光效测试报告。LM79整灯的吧。0 I2 d! }! }- {$ e
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).$ _3 U9 m! I1 n1 w; y1 U
/ ~2 x5 ?% `; x, o" x& U0 {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.
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# j1 P" a# n3 M( q$ n1 r7 O/ ?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.
8 I L& a0 ?: F5 WQ:寿命L-70是啥6 K: q5 t: E- {: e
A:维持70%光通量的寿命
' L1 I4 O, d9 k+ [9 O$ ?; l7 ?Q:谢谢。学到东西了
5 J0 u) k- v- Z5 tA: 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" M- j2 H1 M' k* Y( {
Q:明白了
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发表于 2018-6-29 10:47:25
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