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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, [' ? u& A: @& r! g7 F! w
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 t% ~) W4 Y! k" u* A$ A- G9 [
of Solid-State Lighting Products) l7 g# S" b5 D/ B; |; H# o) A) W z, U
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。
: S* C8 o( F8 v5 t第二个是 79流明光效测试报告。LM79整灯的吧。
% |" |! \' d7 {. @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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0 ~( e3 N; h* M, \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).( ?7 t- |# H0 k
5 s; s( ?# L9 `) Y/ hLM79, 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.0 E9 U1 Y3 U, |9 C# H2 }
3 c5 W( V1 J" k: X9 u d& g) rLM80, 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.5 `5 A% z# U$ w4 m% n2 F9 v
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LM80 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.; E7 ]" ^9 W8 |8 t) o
Q:寿命L-70是啥
) ]+ t% m/ G3 B/ j* ~A:维持70%光通量的寿命
5 K0 l3 E! d bQ:谢谢。学到东西了* q* [$ y+ x: H! H/ X y. ?
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
5 J/ W3 \! a3 y, C/ D4 N. MQ:明白了1 [" s2 i+ v1 ^ g+ R2 I
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发表于 2018-6-29 10:47:25
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