Daniel Ramognino wrote:
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If the max. current per led is 150 mA at a duty 1:10 that means that the led brightness will be ( as some old siemens app. note state) equivalent to the same bright as if you supply the led with 15 mA continuous.

Actually, no. If humans are seeing it, then we perceive the source as brighter than it would be with 15mA, not as bright as it would be with 150mA continuous, but brighter. Its a well known perception thing with human vision.

Steve