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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. \& e( \$ N* Q) V- u0 x- G
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
0 M7 n1 ]8 v( m4 J1 m6 u) D1 rof Solid-State Lighting Products4 Q7 U# U T: v1 f4 A
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。) I' r4 U' ~, r) i/ L& Y; ]
第二个是 79流明光效测试报告。LM79整灯的吧。) M3 B( n2 k, A* s+ {/ u
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?& g3 L+ B% x+ T) \4 W
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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).) }; y2 e, Q0 ]: D3 c. c8 k
! ^6 r, y' M6 r6 ?' m' ILM79, 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.- r' @0 [: v/ r2 N, Q% r
' r. B* b, ]& GLM80, 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.7 m3 {* Y' e. |( z6 n/ g u# |8 S
Q:寿命L-70是啥
& b' l1 j1 J# ~4 ~; l% L$ MA:维持70%光通量的寿命
: Q; F, B9 `, `0 ]( vQ:谢谢。学到东西了. L x0 K6 ~7 [( c! ]
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
9 a% s4 g# Q9 S8 m7 _6 TQ:明白了3 J, V/ y, R; L. r% D4 U- ?, s4 {
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发表于 2018-6-29 10:47:25
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