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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
. }, @* J! I& A: t4 O- YIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
7 T8 M q9 F D+ I: i8 C$ x* P; gof Solid-State Lighting Products
8 z' I2 g1 P; t7 H5 |+ K pA: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。3 ^1 U5 Y- i) n# k& ^! s
第二个是 79流明光效测试报告。LM79整灯的吧。
7 x! j9 \: p* `, M+ L s4 ~8 wThe 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).
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4 @0 B. ^ A# h3 [6 I7 tLM79, 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.% |1 {4 V8 w, y/ I% C8 U8 m
( R8 E$ T) U! H. M" H4 `& 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.2 i1 F8 i7 N k6 r7 k
Q:寿命L-70是啥
B5 n- f+ ]2 \ S! xA:维持70%光通量的寿命
( [* M! n# U$ D# PQ:谢谢。学到东西了
2 d F# t- B: HA: 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0 O Y( s. X- J3 ^ p& n/ O7 E4 e
Q:明白了+ m0 [6 D3 R- v b2 Z% g
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发表于 2018-6-29 10:47:25
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