Mount it and forget it commuter visibility combo kit.
The HL-EL125 is a compact single LED 400 candlepower (14 lumens) head light with a 50 hour run time on constant mode.
The TL-AU165 taillight automatically turns on and starts flashing when darkness and motion are detected by the motion and light sensors (light turns off automatically when you stop your ride). The stay-on function continues flashing while you're paused while riding to ensure safety during traffic stops.
Even if the battery runs out, the reflector continues to ensure rear visibility. The TL-AU165 runs for 6 months without replacing the battery (when used for 30 minutes a day).
CatEye HL-EL125/TL-AU165 Combo Kit
CatEye HL-EL125/TL-AU165 Combo Kit video