![Serfas USL-S](https://static.bikelightdatabase.com/media/lights/cover/usl-s.jpg.960x720_q90.jpg)
- 25 claimed lumens
- 8h 00min reported battery life
- Be-seen
- flashing mode
- no pulse mode
- 2 brightness levels
- Included mounts: Strap
Serfas' USL series bike safety lights are primarily designed for being seen. Although not as bright as the high-powered TSL series lights, these lights are good for adding visibility to your bike when riding at night on lit roads. The 2015 product lineup will introduce several new high-power commuter headlights to the USL series.