Author Cubus USB Rechargeable Rear Bike Light with Automatic Brake Sensor, COB LED 70 lm, Black/Red

Riding in traffic after dark demands a rear light that not only keeps you visible but also communicates your intentions. The Author Cubus answers this need with a 70-lumen COB LED and a built-in brake sensor that automatically boosts brightness when you slow down, alerting drivers behind you. Its 220-degree visibility angle ensures you're seen from nearly every rear approach, while the USB-rechargeable battery eliminates the hassle of disposable cells.

Who is it for

This light is ideal for urban commuters, road cyclists, and e-bike riders who frequently navigate busy streets or ride in low-light conditions. If you value safety, convenience, and reliable performance without the ongoing cost of batteries, the Cubus fits your routine.

Main features

• Automatic brake sensor: instantly switches to a brighter mode when decelerating, acting as a brake light.
• High-output COB LED: delivers up to 70 lumens for excellent daytime and nighttime visibility.
• Wide 220-degree beam angle: covers a broad area behind you, increasing side visibility at intersections.
• USB rechargeable: built-in lithium-ion battery charges in about 2.5 hours via any standard USB port.
• Five light modes: High, Low, Flash, Pulse, and Day Flash let you adapt to different environments.
• Tool-free mounting: flexible silicone strap fits seatposts from 22 to 32 mm in seconds.
• Weather-resistant: IPX4 rating protects against splashing water from any direction.

Specifications

• Light source: COB LED
• Maximum brightness: 70 lumens
• Power source: USB rechargeable (integrated lithium-ion battery)
• Brake sensor: automatic, motion-activated
• Light modes: High, Low, Flash, Pulse, Day Flash
• Run time: up to 2.5 hours (High), up to 10 hours (Flash), up to 12 hours (Day Flash)
• Charging time: approximately 2.5 hours
• Water resistance: IPX4
• Visibility angle: 220 degrees
• Mounting: silicone strap, fits 22–32 mm seatposts
• Material: durable ABS plastic and silicone
• Colour: black body with red lens

Tips

For maximum battery life, use Day Flash mode during daylight and switch to High mode only when riding in complete darkness. After every ride in wet conditions, wipe the charging port dry before plugging in. Recharge the light at least once every three months if stored for long periods to maintain battery health.