Serfas USL-250 E-Lume

At 250 lumens, this light is best suited for city commuting, road cycling, or well-lit paths. While it provides visibility, it lacks the high-intensity output required for technical mountain biking on unlit trails at night.

The light features a built-in three-level battery indicator. This allows you to monitor your power levels at a glance so you aren't caught off guard during your ride.

Yes, the USL-250 has an IPX4 water resistance rating. This means it is protected against splashing water from any angle, making it reliable for riding in light rain or damp conditions.

Yes, it includes a last mode memory feature. When you turn the light back on, it will automatically return to the last mode you were using, saving you from cycling through the settings every time.

The daytime flash mode uses a specific, high-visibility strobe pattern designed to catch the attention of drivers and other cyclists during daylight hours. It is an effective way to increase your presence on the road when visibility is otherwise high.

The included handlebar mount is designed to be versatile and secure for standard handlebar diameters. However, if you have exceptionally oversized or uniquely shaped aero bars, you may need to verify fitment or consider an aftermarket adapter.