Topeak RedLite Aero USB Tail Light. Roxanne may not put on the red light, but if you find yourself riding in the dark the Topeak RedLite Aero USB Tail Light is a must have safety device. Featuring a trio of super bright red LEDs to alert motorists to your presence, the RedLite runs up to 40 hours from a single charge. And recharging is a simple endeavor taking 2 3 hours via the included micro USB cord. Tool free mounting is incredibly convenient and at just 22.2 grams you'll never know the light's there.