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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 ^. D! t' s9 ^) G$ @IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
4 p! _% B! `" s6 o( Hof Solid-State Lighting Products
3 z4 [; T# S/ {, P ~8 M1 SA: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。( i3 E& ~+ z9 U& F5 g$ r+ I
第二个是 79流明光效测试报告。LM79整灯的吧。3 i: r9 O( _! U2 X' ~2 z4 b. i0 ^6 Q
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?# {% e" m! {) E! y
* Y% q/ M, \7 H( f+ Y8 fL70 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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- S0 B" x( o Z$ o3 H% J: f: _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.3 ~7 Y% } h" G
7 z$ Z- z& k: g/ ^9 WLM80, 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." b" u9 O h. K1 M+ ^
Q:寿命L-70是啥
6 K0 a) p/ L( RA:维持70%光通量的寿命
& h+ F' i5 `6 g! c0 P& x/ b( EQ:谢谢。学到东西了
4 B8 |) b9 k3 x1 v9 c0 E4 SA: 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
* C0 p8 x! u5 N5 K2 R+ `Q:明白了
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发表于 2018-6-29 10:47:25
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