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Serfas Thunderbolt Taillight

SKU: Serfas_Thunderbolt_USB_Taillight

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Serfas Thunderbolt Taillight

The Serfas Thunderbolt Taillight can be easily mounted almost anywhere on your bike to increase your visibility at night. By squeezing the light, you can cycle through high beam, low beam, high blink, and low blink.

It has two stretchy silicone straps that you can use to attach it to your seat post, seat stay, trailer, or any creative spot you come up with. It installs and removes in just seconds.


  • USB rechargeable
  • Strip of 30 micro LEDs
  • Two solid modes: High (30 lumens/1.5 hours), Low (10 lumens/4 hours)
  • Two flash modes: High Flash (30 lumens/2.5 hours), Low Flash (10 lumens/8 hours)
  • Unique mounting system with endless mounting possibilities 
  • Charge indicator light


SKU Serfas_Thunderbolt_USB_Taillight
Lumens 30 lumens (high solid & flash), 10 lumens (low solid & flash)
Run Time 1.5 hours (high), 4 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


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