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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
' J/ b: N; |. F, BIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
5 G e: o. x8 z/ u. R& H7 ~of Solid-State Lighting Products5 d- s7 z2 c. u, I2 \
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。
0 S6 ~$ Y$ `& E6 J& J第二个是 79流明光效测试报告。LM79整灯的吧。
* e% f0 W g+ G: UThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?
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8 L' X& p, c3 k. aL70 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). a8 Z1 f* m* N4 |8 Z: [
" [: q( S3 L& _$ h/ w& E8 B' X( @2 HLM79, 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.
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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.6 G5 W5 q/ U" F+ g. _0 h+ S
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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.2 V/ I1 d& q( K% D6 O8 q1 E
Q:寿命L-70是啥9 o7 U) C! E2 n( t7 @
A:维持70%光通量的寿命
2 ~. j' X: H) U8 f) \+ BQ:谢谢。学到东西了$ \( i) B8 Q K5 f4 ?8 F5 Y
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/ Y8 a. W: F# @7 ~( z1 I0 w
Q:明白了9 i7 a- j( ~8 |" z/ f4 o
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发表于 2018-6-29 10:47:25
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