Originally Posted by
tarwheel
I wouldn't run only a single taillight because I've had them fall off or batteries go dead during rides. Personally, I use 3 taillights while commuting. One is on my helmet, one on my rear rack, and the other attached to the left seat stay. My rack light is non-flashing, and the other two pulsing.
Five or more taillights are more than I would want to deal with, particularly charging all of the batteries, but turning them all on and off would also be a hassle.
I have my single bright (Serfas 60 lumen) taillight cable-tied to my seat bag (see image). It isn't going anywhere (lesson learned the $ hard way). I take my bag off to recharge it

In blinky mode it lasts a very long time so I have no problem with keeping it charged up. A co-worker said he saw it about 1/2 mile away in the daylight.