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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
U7 H; c$ w/ J" S) g0 F* dIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements& r2 U' q( Y2 Q
of Solid-State Lighting Products4 P+ N! S3 t; {7 u f0 K2 _
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。
1 o5 ~$ X4 |: ~ j6 I3 j0 e第二个是 79流明光效测试报告。LM79整灯的吧。
' `# w, S/ K+ N7 W! }- ^& C9 j& jThe 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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% D2 j+ }: O6 @& p7 l; E$ |$ }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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6 t8 c5 V6 I; h; v' l3 XLM79, 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.8 i/ X2 ^6 H. `3 J
3 w* V8 m# f6 k @4 e4 qLM80, 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.. u1 \1 q7 q6 L: O- N
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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., R) K" _; N; c9 J
Q:寿命L-70是啥
/ Q5 H& @) w- ~1 n& \A:维持70%光通量的寿命- S0 f n! D. p
Q:谢谢。学到东西了+ ^2 J" _- @ d+ }
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6 E4 O7 r9 @9 m) b; g
Q:明白了# Y$ F0 O0 w V4 g, g4 x
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发表于 2018-6-29 10:47:25
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