Bryton Gardia 300L Rear Light

The Bryton Gardia 300L Rear Light is a radar-equipped rear safety system that combines intelligent vehicle detection, adaptive lighting and connected alerts to improve rider awareness and visibility on the road. Its integrated radar detects approaching vehicles from up to 190 metres away and automatically adjusts the light output to warn traffic based on relative speed and threat level. A high-brightness CREE LED delivers strong daytime and night visibility, while brake detection, ANT+ connectivity and automatic light adjustment work together to provide consistent signalling without manual input. Designed for seamless integration with modern bike computers and smartphones, it delivers clear alerts, long battery life and dependable safety support in changing riding conditions.

Key Features and Benefits:

• Radar vehicle detection up to 190m: The integrated radar continuously monitors traffic approaching from behind and communicates with compatible devices to deliver visual and audio alerts. This early warning system gives riders more reaction time, improving awareness and reducing unexpected vehicle encounters.
• Automatic threat level assessment: The system analyses vehicle speed relative to the rider and automatically changes light patterns to signal danger levels. This ensures drivers receive clearer warnings, increasing the likelihood of earlier recognition and safer passing behaviour.
• 220º wide viewing angle: A broad beam spread increases side visibility as well as rear exposure. This wider coverage makes the rider visible from multiple approach angles, improving safety at junctions and on multi-lane roads.
• High-brightness LED with daytime flash visibility up to 1.6km: The powerful LED produces strong illumination with an interruptive flash pattern designed for daylight conditions. Increased long-distance visibility helps drivers recognise cyclists sooner, reducing closing-speed risks.
• Brake detection with integrated G-sensor: The built-in motion sensor detects deceleration and activates a high-intensity brake light automatically. Clear braking signals improve communication with following traffic, lowering the chance of rear-end incidents.
• ANT+ Light Network integration: Connectivity with compatible bike computers and headlights allows centralised light control and synchronised operation. Riders can manage lighting modes without distraction, creating a more streamlined and safer riding setup.
• Automatic light adjustment via connected bike computer sensors: When paired with compatible Bryton devices, the light switches between day flash and night flash based on ambient conditions. This optimises visibility while conserving battery life, ensuring reliable performance throughout longer rides.
• Long battery life with USB-C charging and smart power management: Up to 17 hours in day flash mode and automatic dimming during low battery conditions extend usability. Consistent lighting support reduces the risk of losing visibility during extended journeys.
• ANT+ and Bluetooth 5.0 connectivity across devices: Compatibility with smartphones, bike computers and smartwatches enables alerts, configuration and monitoring across platforms. Seamless integration keeps safety information accessible without adding complexity.
• Bryton Gardia app control and universal mounting system: The companion app provides vehicle alerts, vibration notifications, firmware updates and lighting customisation, while included mounts fit round, aero and D-shaped seatposts. Easy setup and adjustment ensure consistent performance across different bikes.

Reliable awareness and visibility are essential when riding on open roads where traffic behaviour changes quickly. The Gardia 300L supports this need by combining radar intelligence with automatic signalling and connected alerts that operate continuously in the background. Radar detection works alongside adaptive lighting and brake sensing to communicate rider presence more clearly to drivers while keeping the rider informed through compatible devices. The result is a system that reduces reliance on manual checks and lighting adjustments, allowing attention to remain focused on riding while maintaining consistent rearward awareness.

The Bryton Gardia 300L Rear Light brings advanced radar safety and smart lighting into a compact, lightweight unit that integrates easily with existing cycling technology. Its automatic operation, strong visibility and connected features make it a practical upgrade for riders seeking dependable rear safety support on every ride.

Specification: 

• Detects vehicles up to 190m away and provides visual and audio alerts through compatible bike computers
• 220º light viewing angle
• Automatic threat level assessment and warning light activation
• High-brightness CREE_XPEBRD-L1 LED, the GARDIA R300L offers superior visibility, including a daytime running light with an interruptive flash pattern visible up to 1.6 kilometres (1 mile) away
• R300L includes brake detection, activating a high intensity light mode to alert following vehicles during slowing or emergency braking
• When connected to compatible Bryton bike computers, the GARDIA R300L will utilise the computer’s built-in light sensor to adjust its mode based on current light conditions. In bright conditions, the tail light will be switched to day flash to conserve battery or when riding in darker conditions, the tail light will automatically switch to night flash
• Up to 17 hours of battery life in day flash mode and 12 hours in solid mode, the GARDIA R300L features USB Type-C charging and automatic dimming under low battery conditions for reliable, long-lasting support
• With a compatible Bryton bike computer or with the GARDIA app, the remaining battery time will be clearly displayed right on your screen. Displaying the exact remaining battery hours makes it easier to manage your trip and adjust settings before embarking on a ride
• Compatible with 99.9% of smartphones, bike computers, and smartwatches via ANT+ and Bluetooth 5.0, the GARDIA R300L ensures seamless connectivity
• All features can be controlled via the Bryton Gardia app enabling you to view the status of approaching vehicles, whilst also receiving audio notifications and vibrating alerts when vehicles are approaching
• The app allows you to easily configure your preferences as well as receive the latest firmware updates and view the remaining battery life
• Includes the radar, universal mounts for round, Aero and D-Shaped seatposts, a charging cable and a quick start guide
• Dimensions: 97 x 20.9 x 40 mm
• Weight: 66g
• Light Viewing Angle: 220º
• Waterproof rating: IPX7