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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% C! w% Q+ [" Z, n4 k& T9 z
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
9 l8 c( I, Q0 ]: P% P0 ]6 Wof Solid-State Lighting Products
- Q( _4 n$ D* cA: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 h- p1 m8 ]/ Z8 U6 i- \3 J
第二个是 79流明光效测试报告。LM79整灯的吧。
: W) _; q" y- S$ dThe 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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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).& j2 O( J0 T! I
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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.
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3 _6 S0 T( ]. TLM80, 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.3 V L6 M- u& v& l3 l
+ N2 x& X8 k! kLM80 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.# }, h8 {9 d/ l( r) l+ Z" f* J
Q:寿命L-70是啥
* V7 l/ |- }& ?8 d2 sA:维持70%光通量的寿命5 k$ {- i) v1 |' D
Q:谢谢。学到东西了" U0 E4 U: A+ l% t8 S2 `9 p3 t
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
; D& h) \& k1 z) ~- u, wQ:明白了
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发表于 2018-6-29 10:47:25
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