Originally Posted by
seeker333
+1
Redundancy is critical for taillights, you must have 2 or more. There's nothing more unsettling than getting home after 30 miles in the dark and discovering your taillight quit sometime during the ride. I habitually check mine while riding every so often to make sure I'm still lit up.
I actually do pack an extra PBSF if my home commute is going to be over 5 miles. But I don't mount it - it's a waste of space and battery since the MS rear is so good. Also annoying to take off multiple blinkies when you're locking bike outdoors. I also pack a Fenix L2d 2 x AA flashlight as a backup headlight.