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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: G9 w1 z. u4 W
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
# @. E$ N. J* aof Solid-State Lighting Products+ O6 k }- v/ x, `
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。
N- z$ u6 Q" n% Z' H第二个是 79流明光效测试报告。LM79整灯的吧。
6 S/ w5 j5 m P" b4 CThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?# g p& i; l9 N" G5 r
) b! ]: G4 y( L( U; c- WL70 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).3 N/ ?+ ~' g W- z
g) [" z+ n; `2 @, U* U7 A" @& zLM79, 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.) m9 {# S4 Y) t- I
( H, ~2 g1 E( p9 |, ZLM80, 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.+ V; S/ _6 \( \" E9 u
1 t/ C5 M$ u! s: GLM80 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.
$ T% c, W2 z' k+ X+ h) K( CQ:寿命L-70是啥
$ [: ]8 ]; u6 v( y) o- ZA:维持70%光通量的寿命. F: ?, m4 Y; k. }7 N
Q:谢谢。学到东西了) r% b& A% H6 p
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
, z4 v( w, f- l% k8 nQ:明白了
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发表于 2018-6-29 10:47:25
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