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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 ?" J" F" ]7 {0 L7 }% S: z
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
' H- |1 N" h! u% k2 F6 c( H9 S! }of Solid-State Lighting Products
4 B: }7 L# P- T: B/ I" [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。5 ~0 P, Z6 ^* a% @! d
第二个是 79流明光效测试报告。LM79整灯的吧。' o, _$ T" s8 G8 G3 ^" s t% ~7 P
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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u& I8 o/ I4 t2 gL70 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).0 w4 Q! s1 Y: }' X8 U
, g) H$ }3 ~9 \$ b4 R5 a0 G- |. aLM79, 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.4 |) O. Y; Y( r" h- m1 x$ m& C
3 s4 c4 \2 o1 N2 B: O& \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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c, d7 m6 Q7 sLM80 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.
8 [+ ^6 h N7 F I! g$ {Q:寿命L-70是啥
# W* E1 l0 B5 h* dA:维持70%光通量的寿命$ l0 W' [$ a/ l( u8 G
Q:谢谢。学到东西了
# `% v$ j, D$ v J, c" ~5 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) b; _- P+ M8 f S
Q:明白了0 a2 O$ L4 E3 `7 s8 S: {
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发表于 2018-6-29 10:47:25
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