- 70 claimed lumens
- 6h 00min reported battery life
- Be-seen
- 37 g
- 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.