ROCKBROS RL1F ROAD TO SKY Intelligent Rear Light - Black

Cycling through the city at dusk, you need a rear light that reacts instantly when you brake. The ROCKBROS RL1F ROAD TO SKY intelligent rear light does exactly that—its built-in brake sensor automatically boosts brightness when you slow down, alerting drivers and riders behind you. The vibration and ambient light sensors switch the light on as you start moving and off when you park, saving battery without a thought. With a 400 mAh lithium-ion battery and USB-C charging, it's ready for daily commutes and long training rides alike.

Key specifications

• Bright COB LED with 60 lumens output and 180-degree visibility angle
• Six light modes: steady, breathing, slow flash, fast flash, rhythm flash, and ECO flash
• Smart brake sensing and auto on/off via vibration and ambient light sensors
• IPX6 water resistance—rides through rain and splashes
• Rechargeable 400 mAh lithium-ion battery, USB-C charging in about 2 hours
• Up to 50 hours runtime in ECO flash mode
• Tool-free mounting on seatpost with a durable silicone strap
• Aluminum alloy and PC construction for lightweight strength

Why choose it

This light doesn't just shine—it thinks. Brake sensing gives you an extra layer of safety in traffic, while the auto on/off means you'll never forget to turn it off and drain the battery. The IPX6 rating shrugs off heavy rain, and the long runtime keeps you visible on multi-day tours. Its compact, black design blends with any bike, and the silicone strap fits most seatposts without tools.

Ideal use cases

• Urban commuting in traffic, where brake sensing alerts drivers
• Road cycling at dawn or dusk for high visibility
• Training rides in variable weather thanks to IPX6 waterproofing
• Touring and bikepacking with up to 50 hours runtime on ECO flash

Good to know

The light charges via USB-C in about 2 hours, and the auto on/off feature helps preserve battery life. It mounts securely on most seatposts with the included silicone strap—no tools required. The aluminum alloy and PC body is both light and durable, designed to withstand daily use.