Originally Posted by
zaje
It looks that Superflash (or pretty similar) is branded as "Smart" in Europe, similar run times, looks identical, I will explore those.
Several companies copied Planet Bike superflash lights, I suspect the Smart is one of those.
I had a XLC brand taillight that was identical to Superflash, but leaked water in from rain, the corrosion inside killed the light. That is less likely to happen to a Planet Bike light. But the copies are cheap, go for it.
Some of the Superflash models and also some of the copies have a very tightly focused beam straight back but not much to the sides. So, be careful to aim it well so the traffic behind you sees that tight beam.