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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: C6 q# X4 \. p4 E! \8 c
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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0 ?1 Q) Q* o. ?6 M: L, Y0 ~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。9 J/ i/ m' {% B; w
第二个是 79流明光效测试报告。LM79整灯的吧。/ o$ p9 n- u* U6 C
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 V) V) h5 Q& O) g) N% @4 t% w9 {2 q9 w
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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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6 i: C& i" ~0 n V7 h, RLM79, 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.1 R z% C, ~9 y' h4 E9 M
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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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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.
' g. c7 d5 U& J6 l T9 t, FQ:寿命L-70是啥
% A% x( |: E, f/ D8 ]( {0 g: TA:维持70%光通量的寿命) D+ l1 s* g' h+ m) ~( j- T3 }
Q:谢谢。学到东西了
) U) [5 i0 _0 h8 JA: 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2 D; Z- k! ?0 K* Y3 W
Q:明白了
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发表于 2018-6-29 10:47:25
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