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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 N3 l) D/ n' X- l0 J" s+ G2 G5 ^IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
1 z0 T2 U7 f) T4 Qof Solid-State Lighting Products8 x' `# \% I' y. l9 {
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。
7 f0 M2 Q% N0 s. x+ ~/ }! \第二个是 79流明光效测试报告。LM79整灯的吧。6 Q7 u8 `' p- f2 |
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?( B+ p9 c9 k# n! }
0 a1 H+ o* o: @ x; `2 }% bL70 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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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., S- H9 x& ^* \
4 H F6 T' {, Z! U) }$ LLM80 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.3 t+ T$ i9 _+ U
Q:寿命L-70是啥
& h, A! r- R% t, q" p$ ^/ hA:维持70%光通量的寿命
) i, E) J% `, R: \Q:谢谢。学到东西了4 a$ @- U2 b" o8 p5 _: I+ l
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" a" {5 m7 E! w( S' P+ m& ^
Q:明白了+ {& b* G5 e6 u$ \
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发表于 2018-6-29 10:47:25
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