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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) W- M" O$ X& b( B1 Z1 z! k
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
0 L+ \1 A6 ~3 U, }' y; r4 Zof Solid-State Lighting Products
0 J1 g: h1 j& k& `( w2 Y6 jA: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。
3 n+ c9 }: U V7 C# Y第二个是 79流明光效测试报告。LM79整灯的吧。
1 I* V- @( H+ B, GThe 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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* {7 P4 V9 b8 \, g8 FL70 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).0 x. m& R# I/ t/ {# G
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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.3 `# g. J$ X" N) Z8 J
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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.+ Y% B: j, T1 u+ _
' @, A$ o: \# e* C n) VLM80 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.
9 N% k; C6 F8 v0 t9 zQ:寿命L-70是啥# _% C8 ~3 a" j1 ]
A:维持70%光通量的寿命6 C4 s+ c8 r5 a# b) L0 f" r. h% y
Q:谢谢。学到东西了
/ ~8 d7 ?4 A/ J1 \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
% O! ?* D' [5 r3 Q7 d( L# ]2 _4 [Q:明白了
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发表于 2018-6-29 10:47:25
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