Serfas Quasar Tail Light
Best dependable visibility for urban and road cyclists.
This compact tail light offers essential visibility for cyclists with multiple modes and a decent lumen output. Its user-friendly design includes versatile mounting and a quick-charging, replaceable battery, making it a practical choice for everyday rides.
$19.99
at
Ridgeline Bicycles
Who it's for
- Cyclists prioritizing maximum safety and broad visibility in all conditions.
- Riders seeking eco-friendly and convenient power solutions for their gear.
- Commuters and road cyclists valuing minimalist design and easy installation.
Who should skip it
- Long-distance riders needing extended battery performance for lengthy journeys.
- Daily commuters who frequently remove and reattach their tail light.
- Budget-conscious cyclists looking for the most affordable lighting options.
Performance breakdown
Mounting Versatility
Adapts seamlessly to aero posts, backpacks, and belts with ease.
Weight Efficiency
Featherlight build ensures zero drag for performance-focused cyclists.
Visibility Output
Adequate for urban commuting, but lacks punch for high-speed night riding.
Battery Longevity
Solid runtime for daily commutes, though frequent charging is required.
Maintenance Ease
User-replaceable battery significantly extends the product's total lifespan.
Charging Convenience
USB rechargeability eliminates the need for disposable batteries entirely.
Key Specs
Modes
High (25 Lumens), Low (10 Lumens), Flash (25 Lumens)
Runtime
High (2.5 hrs), Low (5 hrs), Flash (5 hrs)
Weight
46 Grams
Battery Type
Li-Polymer (User Replaceable)
Charging Method
USB quick charge
Charge Time
3.5 hours
Mounting Type
Belt clip, backpack clip, bracket (fits aero-style bars)
Mounting Orientation
Horizontal or vertical
Power Source
USB Rechargeable
Intended Use
Cycling
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