|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的( h! U8 w3 e0 q. J% B
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
) U* l* N9 n2 b$ iof Solid-State Lighting Products, g( w$ f$ J; _: z& f6 s
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。
~; K0 }9 N* [7 [* _第二个是 79流明光效测试报告。LM79整灯的吧。
; S7 G# A" d& H( D7 D- R& a8 tThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?
- Y. d! E" O/ p& A
7 v; K7 v* r. g; ] {6 t5 w$ TL70 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 V g, K/ d" d& {( c% h
/ E% `8 i; W. H8 y
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.
* A8 C+ b/ E8 [# `$ |
, h3 j+ j, P* C! N, aLM80, 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.* A3 |/ w9 b; B
9 \8 Y( }. g$ |0 DLM80 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.
$ l4 ?0 }6 N& uQ:寿命L-70是啥
/ F2 p+ ]5 d6 J$ S1 @* B. HA:维持70%光通量的寿命 O$ }" W* J- X4 s- j
Q:谢谢。学到东西了2 i, q- k4 T% t/ Q( N
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0 d4 W$ |1 w; l/ u/ U d- b
Q:明白了' U' D3 W) j. n- i' S
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )