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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
% s! X# x. a( ~( ?IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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/ Q7 n- S) v. V* g7 U$ g$ y4 kA: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。
1 O8 Z3 S' C8 P- I) e$ i' _第二个是 79流明光效测试报告。LM79整灯的吧。
0 C& d' E3 g; c' T0 f 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?+ e0 n" ]) U9 F& L3 c
+ H4 Z) p# e. Q' E1 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).
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- R4 C5 @2 Q# BLM79, 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. t% B3 o4 @0 v% n* {' }
# ^1 C3 d: i5 H, q1 P! oLM80 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 ]# Y2 k s" d6 O) D4 Q
Q:寿命L-70是啥
3 g0 D' C# n* P" P- a2 h( E4 `A:维持70%光通量的寿命; S f- ?/ }- l, ^% S
Q:谢谢。学到东西了
& t7 i$ q4 c' ^+ g3 Y! V# o6 `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
( g( ^$ o. U B$ f+ A, [- |Q:明白了
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发表于 2018-6-29 10:47:25
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