Serfas Seat Stay Light
Our favorite non-rechargeable light features a 1/2 watt center LED with 6 additional standard LEDs and is visible up to a mile.
Flexible band mounting works well on both seatposts and seatstays, across the back of rear racks, rear baskets, child carriers and even helmets.
The Flash Modes: Steady, Flashing, Alternating Flash
Run Time: Up to 100 Hours flashing on one pair of CR2032 batteries.
Weighs just 36 grams.