Brake lights communicate deceleration to drivers who aren't watching your body language. The Strip Drive Pro Ai Alert 400+ from Lezyne uses accelerometer data to detect when you're slowing down and automatically switches to Active Alert mode, firing a rapid 150-lumen flash pattern that signals braking without you touching any buttons. The system analyzed over 1000 hours of riding data to distinguish actual braking events from normal speed variations, road vibrations, or cornering forces.

The light pushes 400 lumens in Day Flash mode, which cuts through direct sunlight and stays visible from a quarter-mile back in bright conditions. Seven output modes cover everything from that maximum-attention day flash down to a 5-lumen Femto mode that runs for 80 hours straight on the 1900 mAh battery. The constant 80-lumen mode gives you five and a half hours of solid rear visibility without needing to think about battery management during long rides. USB-C charging replaces the older micro-USB standard, and the port seals to IPX7 waterproofing specs.

Ten LEDs sit behind Wide Angle Optics that spread light across 270 degrees, putting red visibility out to your sides rather than just straight back. The co-molded body construction bonds the lens to the housing without separate gaskets that can fail over time. The included silicone rubber mounting strap wraps around both round and aero seatposts, and the strap's ladder design lets you dial in tension for different post diameters. A single button on top cycles through modes and activates the light.... Read More