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Serfas Thunderbolt 2.0 Rear Bike Light

sku# 101114
Serfas - Thunderbolt 2.0 Rear Bike LightSerfas - Thunderbolt 2.0 Rear Bike LightSerfas - Thunderbolt 2.0 Rear Bike Light
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Product Info

Built to exceed your expectations of rear bike lights, the Serfas Thunderbolt 2.0 Rear Bike Light has been developed to be the best on the market. With an Auto Safe Mode that extends runtime an additional 45 minutes, the Thunderbolt 2.0 works overtime to keep you from having to ride home in pure darkness.

Product Details


50 Lumens

Strip of 30 High Powered Red Micro LEDs


Battery500 mAh Lithium Polymer

USB Rechargeable


Solid ModesHigh (25 Lumens): 1.5 hrs, Medium (15 Lumens): 2.25 hrs, Low (10 Lumens): 5.5 hrs

Flash Modes*Daytime Flash (50 Lumens): 19.5 hrs, High Flash Slow (25 Lumens): 9.5 hrs, High Flash Fast (25 Lumens): 5 hrs, Low Flash (10 Lumens)

Auto Safe ModeExtends runtime an additional 45 minutes.


Aero Post Compatible

Additional Features

Last Mode Memory

USB Remote Switch Compatible

CNC Aluminum Heat Sink Light Housing

Water Resistant (IPX4)


  • Biking Type: Urban/Commuter
  • Light Output (lm): 50
  • Weight (g): 40
  • Rechargeable: Yes
  • Warranty: Limited Lifetime



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