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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
" K5 N8 u1 Z5 d- ? e8 t# c7 wIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
( a: W; L. n9 u% h% M( w& Wof Solid-State Lighting Products
: i0 T7 \" F4 a- XA: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。
- k( E2 k# i8 g" ~( K: n% g第二个是 79流明光效测试报告。LM79整灯的吧。
/ v' u7 A6 ~) k/ T! EThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?3 r& z8 Z$ [, r) a: Z
4 l$ k+ f- H$ jL70 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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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.& v% h) W* e; a
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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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( W# C+ ^/ @3 l3 U- @5 G$ M' MLM80 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.' O2 G; q: D% a0 b3 g6 a7 Z3 x, y3 V( t
Q:寿命L-70是啥
6 Q9 r" S; o6 E1 d! N. O8 BA:维持70%光通量的寿命
0 A [/ D" w2 C5 m e( b: fQ:谢谢。学到东西了
# ^, W- i x9 e6 b# n% J/ S" rA: 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
: u0 V% L! @4 r7 z6 A; @Q:明白了
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发表于 2018-6-29 10:47:25
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