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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
2 B! u! p) x( a0 n5 p0 E' Z4 \IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
* u. j& W* @3 y# n' lof Solid-State Lighting Products
; ^ U' y2 x6 m$ Z. R+ RA: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。
. ]6 a# |; v- R, g- ]第二个是 79流明光效测试报告。LM79整灯的吧。) {+ I& ^& D* h# A
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?- \3 ^. p6 N* ]: D
* m1 x* ]* N( j9 b! X! _5 UL70 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).2 W4 Y* q. s2 _4 _4 C$ Z& }
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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.. e2 S4 H! i0 d& N O# a* z
* ^- P( s4 _. u+ i G ILM80, 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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! w: \4 W* j% B6 wLM80 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.: O4 j7 V( c% x/ s' e, P! G) J5 S
Q:寿命L-70是啥3 k0 f8 m) q# ?$ [, k7 ~: I
A:维持70%光通量的寿命0 t9 [# B, U o9 t
Q:谢谢。学到东西了, b$ h$ g& O& |( \- b# c; l; t
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
' Z" I! Z, E" \) |( @9 j; CQ:明白了* w! [2 f2 [; L1 I6 R/ O
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发表于 2018-6-29 10:47:25
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