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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- e1 S9 x8 \) k, ] A* e! B
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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。3 U; z, M; j( b6 F4 s$ J, L( `; B: x
第二个是 79流明光效测试报告。LM79整灯的吧。
- { u" u# M; C6 b& bThe 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).
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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.
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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.3 A4 F3 A7 \3 T4 D( G
Q:寿命L-70是啥$ b2 e6 X! X6 @
A:维持70%光通量的寿命
; ]7 R h4 t5 J7 N7 U" Q: L0 {Q:谢谢。学到东西了
' k% K5 ^. R m& Q' V( fA: 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: \2 O, | [/ A; d/ w
Q:明白了& z" ?' Q# x" J: Q& m6 \6 F
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