Due to the COVID-19 pandemic, delays in processing times may occur.

Serfas Thunderbolt Headlight

SKU: Serfas_Thunderbolt_USB_Headlight


Serfas Thunderbolt Headlight

See and be seen. That's what bike lights are for. Most headlights do a good job of spotlighting the path in front of you so you can see where you are going. The Serfas Thunderbolt Headlight casts light over a wider area, helping you to be seen from the sides.

The other unique quality of this headlight is the mounting system. You can use the two stretchy silicone straps to mount the light nearly anywhere. Your handlebars, head tube, or fork are all logical places. Or you can get creative and mount another one on your top tube or seat stay and show off your good taste in footwear.

With seven colors to choose from, you can coordinate your lights to match your bike, your kit, or your favorite sports team.


  • USB rechargeable
  • Strip of 15 double strength micro LEDs
  • Two solid modes: High (90 lumens/1.5 hours), Low (30 lumens/4.25 hours)
  • Two flash modes: High Flash (90 lumens/2.5 hours), Low Flash (30 lumens/8 hours)
  • Unique mounting system with endless mounting possibilities 
  • Charge indicator light


SKU Serfas_Thunderbolt_USB_Headlight
Lumens 90 lumens (high solid & flash), 30 lumens (low solid & flash)
Run Time 1.5 hours (high), 4.25 hours (low), 2.5 hours (high flash), 8 hours (low flash)
Battery Lithium polymer, 500mAh
Charge Time 4 hours by USB wall charger, time dependent on computer USB current
Weight 54 g w/ straps
Dimensions 3.5" x 0.75" x 1.0"
Material Silicone


Q & A