Hollywood Racks SEEMEE 150 MAG Magnetic Rear Bike Light 150 lumens USB-C IPX6

Dual-Color Visibility for Day and Night

The SEEMEE 150 MAG delivers 150 lumens through red and white LEDs, providing a dedicated Daytime Flash mode that runs for 13 hours on a single charge. Magnetic and quarter-turn Garmin-style mounts allow tool-free attachment to handlebars, seat posts, saddles or compatible LUMOS helmets. USB-C recharging completes in 2.5 hours and includes an anti-accidental activation lock with a clear battery indicator. IPX6 rating ensures reliable operation in heavy rain and road spray.

Verify Mount Compatibility and Control Hardware

Confirm that your handlebar, seat post or saddle rail accepts the included silicone strap or quarter-turn adapter before ordering. The FTR LightSync group-sync feature requires an MJ-6558 remote paired with an ALLTY 800 V2.0, ALLTY 1200 or ALLTY 1200U front light; without that combination the taillight operates independently. Ensure you have a USB-C power source available for the 2.5-hour recharge cycle. The light is not submersible, so avoid immersion in streams or pools.

Sustained Output in Wet Conditions

Under continuous use the Daytime Flash mode maintains its 13-hour runtime without thermal throttling, and the IPX6 seal preserves performance during prolonged downpours. Battery-indicator LEDs remain accurate throughout the discharge curve, preventing unexpected blackout on long rides. The magnetic mount holds securely over vibration-heavy terrain such as gravel or mountain-bike trails, while the lock function prevents unintended activation during transport or storage.