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IEC62612里面有说明。
2 S" z2 L% Q( f0 M" U6 r# d+ ^# j rThe LED lamp shall be operated for at# g. p0 a4 f% p5 T( v
least 30 min and it is considered stable and suitable for test purpose, if the relative
$ z: V& F5 }8 g0 w5 j& Gdifference of maximum and minimum readings of light output and electrical power
2 e( m& e5 t3 |% m! w% F8 Robserved over the last 15 minutes is less than 0,5 % of the minimum reading. If the LED
9 |, g4 F. k- K1 }lamp is pre-burned, it does not need to be operated for 30 min, and it is considered stable5 @$ h3 m) K" h) y; D1 ~! T9 q
if the readings of the last 15 min meet above requirement. |
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