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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/ c5 n+ d \% M q9 N+ W3 W0 B
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
& S0 o5 f5 T5 @, y: Uof Solid-State Lighting Products/ ~7 r$ C3 i# J9 Q0 @
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。2 o9 s! n0 d/ ?; W
第二个是 79流明光效测试报告。LM79整灯的吧。( }/ C6 ~6 x. _; c8 F
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?6 {. _4 s( w; l. X
8 ~- {. {! D; N1 P1 m9 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)., |. r. \7 }! V" p+ H
" y9 c. w8 E; H+ C) ]7 PLM79, 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.; T( r$ v3 b, p) Z6 m2 ~. t9 X
7 e9 y5 V) O+ l6 F' o( |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.+ d3 h/ R4 n( s! p$ M2 E4 N
6 B. N' j" ^- ]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.9 G4 A- _% l5 p2 g1 ?( d
Q:寿命L-70是啥
( }8 `; v) L- d+ w9 E/ R# j, z7 gA:维持70%光通量的寿命% k8 W# J2 w" B, V! O6 s' d
Q:谢谢。学到东西了
) `6 [3 _4 v/ _- g. p# J0 E; h3 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9 K0 p5 S& a( T9 b) j( @
Q:明白了
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发表于 2018-6-29 10:47:25
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