Topeak's RedLite UFO Mini mounts on seatposts, seatstays, and Topeak saddles. Its two super-bright red LEDs provide 330 degrees of exceptional visibility to alert traffic approaching from almost anywhere. The RedLite's watch-style lithium battery (included) offers 120 hours of burn time. Plus, you can choose from a constant or blinking mode.
Run time: 60/120 hours (constant/flashing)
Weight: 15.6 grams