Serfas USL-5
  • 70 claimed lumens
  • 6h 00min reported battery life
  • Be-seen
  • 37 g
  • flashing mode
  • no pulse mode
  • 2 brightness levels
  • internal Lithium batteries
  • low battery indicator
  • micro usb rechargeable
  • 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.