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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
" Z" j4 H3 n7 [7 JIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements8 T* f6 T& B5 f S5 ^
of Solid-State Lighting Products
' N! L; u7 q0 D+ z+ [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。
: Z' i! f' D3 x2 U3 J! K第二个是 79流明光效测试报告。LM79整灯的吧。
' s5 ?+ `5 d7 L% G ?8 RThe 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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) c5 I* \ O! \4 u. [- pL70 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).2 b- h9 q" W! w( {9 a
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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.: Y% }' i4 P2 ^4 z/ T
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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.
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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. }& k5 ]( \8 r
Q:寿命L-70是啥
% p& \+ U( o5 D' x7 P' J% O$ ?( SA:维持70%光通量的寿命9 u3 I D( i. G# C1 G3 u
Q:谢谢。学到东西了# P: G d* Z4 X/ k0 }; }4 p3 b
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 B$ c( F: v8 e5 O; q
Q:明白了
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发表于 2018-6-29 10:47:25
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