IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements

ledpan

Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
& C- Q, O, l. H% KIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
of Solid-State Lighting Products
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。
' G4 r4 i$ ~2 Y9 p/ M" ?& }7 N% y第二个是 79流明光效测试报告。LM79整灯的吧。
' b' {3 ~% |, `! b; i4 sThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
. S5 ?8 Z5 Z+ K4 ?6 v
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).

% O, d/ v3 J7 X4 I% w2 V6 c) f) `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.

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.

- i- r4 }5 P$ k3 M/ G4 BLM80 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.
3 A. N/ N: X  ^- C% VQ:寿命L-70是啥
A:维持70%光通量的寿命
; a% `1 L* e  k) ~! [5 e9 p2 m. `Q:谢谢。学到东西了
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 X( i  z/ W5 L1 _/ fQ:明白了