Serfas UTL-9 Tail Light
Best compact, high visibility safety light for urban and road cyclists.
A compact, high-visibility rear light that balances brightness with flexible mounting options. It is an ideal choice for commuters who need a reliable, rechargeable safety light that transitions easily from the bike frame to a backpack or belt.
$29.99
at
Ridgeline Bicycles
More Flat Panel options
Who it's for
- Cyclists prioritizing maximum safety and side visibility in traffic.
- Riders seeking an unobtrusive tail light that looks good.
- Commuters and casual riders who value hassle-free power management.
Who should skip it
- Cyclists with non-standard seat posts or specific mounting preferences.
- Serious night riders needing the brightest possible rear illumination.
- Tech-savvy users desiring advanced light patterns or smart connectivity.
Performance breakdown
Daytime Visibility
The 40-lumen daytime flash mode cuts through bright, direct sunlight effectively.
Mounting Versatility
Dual attachment options make swapping between bike posts and bags effortless.
Weather Durability
IPX4 rating handles road spray and light rain without any issues.
Charging Convenience
Micro USB recharging eliminates the need for constant battery replacements.
Compact Design
Lightweight 41-gram profile keeps your setup clean and aerodynamic.
Light Output
Solid brightness for urban commuting, though less intense than high-end mountain lights.
Key Specs
Brightness
40 lumens
Light Source
40 micro LED panel
Water Resistance Rating
IPX4
Rechargeable
Yes
Charging Method
Micro USB
Battery Type
Lithium Polymer
Mounting Type
Rubber strap mount and metal belt clip
Weight
41 grams
Light Modes
High (20 lm), Low (10 lm), Daytime Flash (40 lm), High Flash (10 lm)
Intended Use
Cycling and commuting
Know before you buy
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