Serfas USLA-7 Thunder Blast Headlight
Best powerful light for serious night cyclists.
This taillight offers a unique audible warning system for low battery, ensuring you're never caught in the dark. It provides multiple lighting modes and impressive battery life, making it a reliable safety companion for any cyclist. Its adaptable design and USB charging add to its user-friendly appeal.
$34.99
at
Brantcycle
More Thunder Blast options
Who it's for
- Cyclists prioritizing safety and clear vision on dark roads.
- Riders seeking a reliable, long-lasting light for all-weather use.
- Commuters and trail riders needing flexible lighting options.
Who should skip it
- Endurance riders needing sustained maximum brightness for extended periods.
- Budget-conscious riders seeking an economical lighting solution.
- Urban riders sharing paths with others who prioritize courtesy.
Performance breakdown
Lumen Output
Adequate for urban visibility, but lacks the punch for dark trails.
Battery Efficiency
Impressive runtime management keeps you visible for long commutes.
Weight Profile
Featherlight construction ensures it never weighs down your cockpit.
Mounting Versatility
Extra-long straps accommodate aero bars and unique frame geometries easily.
Safety Features
The audible low-battery warning prevents unexpected mid-ride power failure.
Charging Convenience
USB rechargeability eliminates the hassle and waste of disposable batteries.
Key Specs
Weight
48 grams
Max Brightness
100 lumens
Max Runtime
14.5 hours
Power Source
USB rechargeable Li-Polymer battery
Number of Light Modes
4
Mounting Mechanism
Extra long straps
Mounting Location
Handlebar
Sound Output
85 Decibels
Material
Plastic
Water Resistant
No
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