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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. p' \$ S4 ~, i4 @
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
1 A) e1 v; j" R* Hof Solid-State Lighting Products
! g! f; o" r# O. A8 q0 Y! r0 IA: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。
5 w5 z& `2 U# ~( v3 S$ t/ R2 V, L8 ?9 I第二个是 79流明光效测试报告。LM79整灯的吧。
# h7 y% X/ z+ N/ j! ?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?
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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 L% u1 P2 W& \! p
" h/ O9 [7 V0 ELM79, 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.* E! }# N# Z( ^1 B5 J
; ^) {9 z& i7 O9 U$ Z1 BLM80, 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.5 [9 q' b0 s' v" w3 n9 D; d
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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.& _+ s# s& _, Y/ n* J/ k
Q:寿命L-70是啥2 v& n% M8 L4 R$ [1 E
A:维持70%光通量的寿命* B/ V" J6 w2 {, v* p# L& e- k' N& i
Q:谢谢。学到东西了
) ^& E) F2 Q$ q& p9 _! Y) b& aA: 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
" c, u# O5 R( R0 }( [% L o) tQ:明白了
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发表于 2018-6-29 10:47:25
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