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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6 m, ^; P5 w& `, g' o- N3 C# _
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements; U: `8 F) r) Z& ]. l5 }0 `2 v: O
of Solid-State Lighting Products- P$ @: }2 G4 _0 z
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。$ L/ n& a/ f- x
第二个是 79流明光效测试报告。LM79整灯的吧。
8 U, u% r7 }( SThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?+ k4 z9 P" q. L
" Z [) Q& T, w5 _5 z$ ~$ ^6 j- E8 BL70 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).+ G, t- {& r/ p
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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.- p8 J4 {9 x3 S
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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.! n- [2 [6 j4 U- A/ _5 m
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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." k" C$ w: _/ r, O
Q:寿命L-70是啥: G8 F# S. M2 b6 ?
A:维持70%光通量的寿命7 S0 `. u7 L% c, T
Q:谢谢。学到东西了
# E, q& Y5 X% W- s! v" q6 sA: 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
) R- s7 t2 s/ E- Y( m2 p* x/ }+ H3 kQ:明白了4 s2 ]) a) q0 L8 Y' X0 z
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发表于 2018-6-29 10:47:25
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