Gaciron LOOP-100 Rechargeable Smart Brake Tail Light

With smart brake/motion sensor function, the rechargeable Gaciron LOOP-100 tail light is both a rear light and brake light. A motion sensor registers when brakes are applied, which then triggers the brake light. LOOP-100 charges via USB-C in 2.5 hours, with the on/off switch turning blue to indicate when it’s fully charged, and battery life varies between 5.5 and 40 hours, depending on which mode it is in, and also depending on the amount of braking. The handy battery indicator provides a rough idea of how much runtime remains. It features six modes, three of which emit a steady light at differing levels of brightness, with the other three being flashing modes. Trail mode is a quick bright flash, Power Saving is a low slow flash, while Fog Light is somewhere between the two. While the ‘brake’ light is 100 lumens, Gaciron doesn’t list the strength of the other modes, but they’re bright enough to maintain visibility in varying weather conditions. The brake sensor functions in any of the six settings, and is brighter than any of the modes, so that braking is always obvious. It also features a sleep mode, where the light automatically shuts off after two minutes, when no movement is detected, and as soon as movement is detected, it automatically switches itself back on. The LOOP-100 comes with two magnetic mounting options: a tool-free option that attaches to the seatpost, and a bracket that fits under the saddle.