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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2 U+ x( `" S8 x6 w1 f6 e! X! s5 u
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
" R+ V) \( r/ S) L! w2 rof Solid-State Lighting Products
T# c: h0 s9 w6 u1 QA: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。+ @6 n, i, @- Y$ ` b7 z3 [
第二个是 79流明光效测试报告。LM79整灯的吧。
$ W# f5 t; t5 h; NThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?+ j( Z2 h2 _7 U1 y9 s0 J
1 ~" @5 h. p, s( v8 LL70 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.
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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.; F& u, o6 y0 p
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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.4 f+ L" B0 l* o1 y
Q:寿命L-70是啥/ s7 E) c4 ~1 ~8 H9 T
A:维持70%光通量的寿命
& O8 ?7 r& o7 }) C4 j5 s7 XQ:谢谢。学到东西了8 E6 F }: H2 K# A- 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
% s) R8 `$ F2 }" gQ:明白了
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发表于 2018-6-29 10:47:25
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