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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3 ~. e* N- T! I: E9 y, B
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements0 H0 w" x9 f6 H: J
of Solid-State Lighting Products5 E( A1 d& z. j8 ~2 u4 e9 |
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。
2 n/ C/ X+ K3 b& H3 z第二个是 79流明光效测试报告。LM79整灯的吧。4 \; w- L) ]0 b$ M
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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7 F0 V) j; \2 M* `3 oL70 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).5 }- N( o j* A: W! U: z" K- ]
7 A" {4 z$ a& |( V% LLM79, 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.6 C- q$ p; D( Q
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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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' t. g# V( f9 t% f$ }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.
9 x' T) g4 |" l9 k: F( Z; L7 ^- BQ:寿命L-70是啥
! b( r0 @% E0 g; B z7 ]' n# {A:维持70%光通量的寿命6 X) W( E( R6 k
Q:谢谢。学到东西了% `2 H' E4 r5 O, Y. l6 y' A8 G
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
/ o2 D7 R/ h, N8 c" NQ:明白了9 c, w, _6 J* T4 D/ [
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发表于 2018-6-29 10:47:25
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