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I agree, this is one of the reasons I have been considering these. Though for now the main reason would be to have something sitting higher up than on the handlebars and seat post, e.g. in traffic or narrow side roads with parked cars.
And I like that it is two-in-one which would mean not having to deal with two more lights all the time.
And last but not least it is nice to have a back up if one of the two main lights fails.
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