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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# k2 `# t6 o- n" BIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
; L, K0 l4 P* x" n+ e8 ^of Solid-State Lighting Products
" u4 v/ Y6 ^2 l9 v" SA: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 k: j9 X* ~% X7 m2 r
第二个是 79流明光效测试报告。LM79整灯的吧。4 w/ E6 P6 [: m2 t8 s
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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6 o! P |9 @2 Y/ X9 t+ V# ]4 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).
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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.
- m6 p+ {, M2 S9 kQ:寿命L-70是啥
! r! p7 {5 S& mA:维持70%光通量的寿命
) |! P: r6 y a6 M) ~* h' XQ:谢谢。学到东西了
4 z% d4 V* I. V6 Z( N. kA: 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
' a; x' W7 G0 [! }" nQ:明白了/ w% `4 N; T$ C, a0 }
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发表于 2018-6-29 10:47:25
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