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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
# d$ ^7 N4 l2 x, a3 R( TIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 L6 s" M, }+ X' s
of Solid-State Lighting Products
! o' `" J$ h# P4 [. c7 QA: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。/ e/ O/ ~% z& f$ C
第二个是 79流明光效测试报告。LM79整灯的吧。) C2 P# Y1 U' F; s: {1 G6 g( }$ V
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?
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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). u- a' A$ O6 ^" {9 @9 g2 b, q
4 c2 z+ f7 w5 P2 ?0 ]2 K: p0 A2 d; 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.
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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.( n& E' ^5 c9 u E8 a' [, ^( `, |
, C- `, Q% c( T3 f" W3 mLM80 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.
( o; t5 @+ s1 _) k1 w$ o7 D- C0 eQ:寿命L-70是啥3 R* n3 R/ i( P( D
A:维持70%光通量的寿命
Q5 q7 q: \ ^0 Q: h4 I/ ]8 X4 CQ:谢谢。学到东西了
; ?; p1 J+ T ~* e+ d+ K" qA: 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
- A$ F1 a% Q" DQ:明白了) M( }9 K- q* s( z+ K X+ m
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