Rare Break Light

Key Features

• Automatic Brake Detection: Integrated brake sensor detects when you’re slowing or stopping and significantly increases brightness to alert other road users. Fasoni

• Ambient Light Sensor: Adjusts brightness based on surrounding light conditions, so it’s not too bright at night and still visible in daylight. Fasoni

• Four Light Modes:

  Constant (steady) light

  Flashing

  Pulsing (“intelligent” mode)

  Smart / automatic mode (changes depending on environment) Fasoni

• Weather Resistant: Rated IPX4, making it splash-proof and suitable for typical UK weather. Fasoni

• Mounting Options: Can be mounted under the saddle or on the seat‑post. Installation is tool-free and designed to be easy. Fasoni

• Battery / Power: Rechargeable via USB. Fasoni

• Material & Build: Made from durable ABS plastic + aluminum, giving a robust but lightweight finish. Fasoni

• Brightness: Up to ~50 lumens. Fasoni

Dimensions & Weight

• Very compact design, making it discreet under the saddle or on the seat post. (Exact weight isn’t listed in the source.) Fasoni

• Lightweight due to its mixed-material construction (ABS + aluminium). Fasoni

Safety & Visibility

• Because of the brake-sensing feature, the light becomes significantly brighter when you hit the brakes, improving safety by clearly signalling deceleration. Fasoni

• The ambient sensor helps make it adaptive: more visible in bright conditions, but not distracting at night. Fasoni

• The 4 lighting modes cover a range of riding scenarios — commuting, urban, night rides, etc. Fasoni

Durability

• IPX4 rating means it’s protected against splashes from any direction — suitable for rain, but not for full submersion. Fasoni

• Robust housing combining plastic and metal keeps it resilient under typical riding conditions. Fasoni

Use Cases / Ideal For

• Daily commuting — great visibility and automatic brake signalling make it ideal for urban riders.

• Evening rides — adaptive brightness helps visibility without blinding.

• Longer rides — USB recharge means no need for frequent battery swaps.

• Riders who want a compact, clean look: the slim design fits neatly under the saddle or on a seat post.