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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
& \; s+ ^" y# V( ]9 EIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements" M1 o* L6 d7 P7 [* A8 g1 i
of Solid-State Lighting Products( p/ a% u2 A8 S! O4 s4 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。
) p8 R0 N5 _6 w4 `第二个是 79流明光效测试报告。LM79整灯的吧。
$ b' @; W7 L2 E4 ~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?. b. }6 C% f% Z) |6 }" Z
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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).3 Q: ~2 i8 D; ~8 \1 t2 N) z; z' P4 x
1 O6 \; \$ s5 E6 Z# Q/ X& ZLM79, 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.& ~" b, G) l( l# C0 [1 `& l+ B
2 \6 i8 T: r. ?) l% xLM80, 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.
( Z7 f6 Q% q6 B# Y* p8 b$ s( i. [Q:寿命L-70是啥
" }& z+ [( H. c1 |( G/ {! b8 T6 LA:维持70%光通量的寿命& S' \- }& A8 z) A, \& c( ]% |
Q:谢谢。学到东西了
( d( e6 D2 l. e' c! f0 p2 w5 nA: 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" `% i' W3 c' @1 p1 L1 ?
Q:明白了! f! A( F, ?' z: f5 v! }2 l/ o
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发表于 2018-6-29 10:47:25
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