The MagicShine is the same emitter as the 140L as far as I can tell, plus a ring, and is much more visible to the side than the Dinotte 140L. Mounting isn't any better than the 140L though. There have been a few threads on mounting the MS tail.
That said, it's probably hard to beat the Cateye LD1100. It actually has LEDs pointing directly sideways.
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