Sinlac, I live car free, and the bike which is my daily commuter has a Dinltte 140L tail light on it (as well as a second tail light, which cannot be seen when the Dinotte light is on.) I have the PB Superflash on another bike, since it is good enough when I find myself out with that bike after dark, but if I know that I will be out in the dark, I use the Dinotte.

The PB Superflash is plenty bright to allow you to be seen. The Dinotte is in a whole other class, it does not merely allow you to be seen, it forces drivers to notice you. With all of the distracted drivers on the road, if I am going to be sharing the road with a distracted driver I want to be the distraction, and the Dinotte tail light does that for me. I have a Dinotte 200L on the front, which I set on flash mode, for the same reason, that light forces drivers to see me. I have a separate headlight (Supernova E3, powered from a generator hub) which I use to see the road - in an urban environment, it is enough to see by.