Serfas USL-6BK Thunderbolt, Front Light Black


15 in stock

SKU: 713835022931 Categories: ,
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Serfas USL-6BK Thunderbolt Front Light Description

Serfas USL-6BK Thunderbolt Front Light delivers 90 lumens in an extremely versatile, USB-rechargeable package. Attach the water-resistant silicone body nearly anywhere on your bike, and use the high, low, or two flash modes to make sure cars, cyclists and pedestrians can see you at night. At just 50 grams, you won’t even notice it’s on your bike — but others will!

Durable Silicone Rubber Encased Light Body

Very Bright For Its Size – 90 Lumen Output

Highly Versatile Mounting Possibilities

4 Lighting Modes

Built-In USB Charging

Water Resistant Construction

Serfas USL-6BK Thunderbolt Features

  • USB Rechargeable
  • Charge Indicator Light
  • Includes Longer Strap To Allow More Mounting Options
  • Removable Straps Allow Endless Mounting Options
  • LED Strip Creates A Non-Directional Flood Of Light

Serfas USL-6BK Thunderbolt specifications

  • Modes:
    • High (90 Lumens): 1.5 hrs
    • Low (30 Lumens): 4.25 hrs
    • High Flash (90 Lumens): 2.5 hrs
    • Low Flash (30 Lumens): 8 hrs
  • Weight: 54 Grams With Bracket
  • Battery: 500 mAh Lithium Polymer

E-Bikes of Holmes County other Accessories

Check out all of our other bike lights as well. We also carry wire baskets for the back racks of E-Bikes. You can purchase water bottle cage holders through our website as well. Topeak also has a top carrier bag that has pannier bags if you need them. Many of the Amish use the carry all bags to haul groceries and luggage. They are durable and reliable.

E-Bikes of Holmes County has many other accessories. These include hitch racks for cars, skirt weights, mirrors, seat posts, saddles, Muc off products, goggles, Oakley’s, heated apparel, winter apparel, reflective straps, Proviz jackets, shokz, Bluetooth helmets, helmets with lights, headlights, taillights, regular helmets, Theragun products, brake pads, trailers, trailer hitches, water bottles, bow and gun holders, gup, digital tire inflators, tubes, tires, pepper spray, keyed locks, combination locks, Galeo, bike alarms, glow whips and much more!


I like how this light is extremely bright and spreads light everywhere, plus the multiple mounting options…I may buy another one.
OUTSTANDING light! I love how I can charge it from any USB port, even in the car, with no additional chargers. The stretch mount in one of the best I’ve seen. After working in a bicycle shop for 12 years, this is hands-down, the best tail light out there. I also like the white version, on bright flash mode, as a be seen” headlight on the road. I’ve been using my pair for over a year”.


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