The Lezyne Strip Pro Ai Alert 400+ is a high-performance rear light designed to maximise rider visibility and safety through intelligent lighting technology. Combining powerful output with advanced Ai Alert functionality, it delivers a smarter and more responsive way to stay visible on the road.

At the core of the system is Lezyne’s Ai Alert technology, which detects deceleration and automatically activates a rapid, high-intensity “brake light” flash. This feature clearly signals your movements to traffic and other riders, improving safety in group rides and urban environments.

With a maximum output of 400 lumens in Daytime Flash mode, the Strip Pro ensures exceptional visibility even in bright conditions. Its wide-angle optics provide up to 270° of light dispersion, making you visible from multiple angles at all times.

The light is built with a durable co-moulded construction and features 10 high-output LEDs for an optimised beam pattern across all riding conditions. Offering up to 80 hours of runtime and seven combined solid and flash modes, it adapts easily from daytime riding to low-light conditions.

Designed for everyday practicality, the Strip Pro Ai Alert 400+ includes a versatile silicone strap mount compatible with both round and aero seatposts, along with USB-C charging and an IPX7 waterproof rating for all-weather reliability.

Blending high output, long runtime, and intelligent safety features, the Strip Pro Ai Alert 400+ is one of the most advanced rear lights available for road, gravel, and commuting riders.

Key Features

• Ai Alert brake light technology detects deceleration and triggers alert flash
• Up to 400 lumens output for maximum daytime visibility
• 270° wide-angle visibility for enhanced safety
• 10 high-output LEDs for optimised beam pattern
• Up to 80 hours runtime depending on mode
• 7 lighting modes including Daytime Flash and pulse modes
• Durable co-moulded construction for long-term reliability
• USB-C rechargeable (cable not included)
• IPX7 waterproof rating for all-weather riding
• Flexible strap mount fits round and aero seatposts

Technical Specifications

• Max output: 400 lumens
• Max runtime: up to 80 hours
• LED configuration: 10 LEDs
• Battery capacity: 1900 mAh
• Charging: USB-C
• Visibility: 270°
• Waterproof rating: IPX7
• Weight: approx. 70–71g
• Mounting: Silicone strap (round & aero compatible)