Good visibility and hours
by iwhki from Finland
I've owned many tail lights but PDW Radbot 1000 seems to rate above the rest. Very bright led which also spreads light sideways quite well. The included reflector is nice addition and very useful when riding on the road. Comes with several holster/holder types which you can use to fit the light, no only to your seatpost but also to other parts on your bike.
Size is not tiny but not huge either. Still, it takes some room if you carry it around in your pocket but on the other hand you get a bright tail light with long lifetime and good durability.