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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: N: w, {/ y. E9 s: s% ]
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements Z8 z& P+ V7 E9 @2 P
of Solid-State Lighting Products
7 x) |3 I* |& j/ w4 g: {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。0 @3 [+ o2 _0 x; e& n
第二个是 79流明光效测试报告。LM79整灯的吧。& {# ]9 o1 W5 |5 [4 q
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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/ }; f! B" r! x* p" U. X. ]% zL70 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).6 @! t2 |8 `$ A# h7 O) ]1 `& q; d
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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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% D& Q6 _6 \( i& q6 aLM80, 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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% ]: [# N& f6 ^6 Z, I) Y, L- ILM80 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.
5 P/ g# z( K; U- QQ:寿命L-70是啥! S! S* g" @" a1 @ {! @9 x
A:维持70%光通量的寿命
; y1 ~, W, p+ ~( kQ:谢谢。学到东西了
# P; W/ L+ H8 c/ j* E: Y( ~$ i, U6 bA: 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6 q' ~/ y _ C. E
Q:明白了: R! ~) h, D, x9 F
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发表于 2018-6-29 10:47:25
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