Topeak's WhiteLite Race & RedLite Race Combo light set provides 2 super-bright LEDs in each light for excellent visibility. They attach easily with their no-tools rubber mount. The coin batteries (included) deliver up to 140 hours of run time. And, the combo lets you use a constant or flashing mode for versatility.
Run times: 70/140 hours (constant/flashing)
Weight: 40/37.6 grams (front/rear)