Portland Design Works' Radbot 1000 Taillight shines brightly to enhance your visibility when the sky turns dark. It boasts a 1-watt LED with three modes and a precision reflector to notify others of your presence. And, the Radbot includes mounts for a rack, seatpost, seatstay, and backpack, so you can put it wherever you want.
Run time: 30 hours (flashing); 15 hours (steady)
2 AAA batteries are included
Real-life light test
Radbot on the roadways