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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) v% K) O4 Y8 J: J2 L
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements" I& E1 G4 R' E% O5 g; |
of Solid-State Lighting Products
5 i1 c( Q: ^6 \$ Q* s$ ZA: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 w; h1 p4 m$ B2 @/ ~) Q8 g
第二个是 79流明光效测试报告。LM79整灯的吧。
+ X( V& f( ?+ @2 \0 EThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?0 R5 o% \' U9 h0 `# Y$ h: 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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. k7 K3 k- q# W8 ]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.. K$ R) Z' D; t2 J" D4 e
! l( p3 w4 \+ w F7 w* t9 ?1 TLM80, 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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7 Z) S8 f5 _, B- \1 @8 t) |$ c" `4 BLM80 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.
' i" }5 p6 b" X3 r/ zQ:寿命L-70是啥 l% A# G& X3 j7 u9 I
A:维持70%光通量的寿命
3 p7 T' w( b/ UQ:谢谢。学到东西了/ |- e: d& z1 l! U( b
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
% m) R/ |! N$ U* W- w6 N5 {Q:明白了
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发表于 2018-6-29 10:47:25
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