540 ST LED USB Front & Rear Bike Light Set
Visual efficiencyPower: 10 lux
Effective at low speed.
VisibilityPower: 26 lumens (front) / 3 lumens (back)
Visible at the back from 220°
AutonomyFront continuous mode: 2 hrs
Back continuous mode: 4 hrs
Rechargeable via USB.
VersatilityWHITE (1 mode) and RED (1 mode)
Universal elastic mount
WaterproofIPX 4: withstands spray and heavy, persistent rain.
Lab tests are conducted to approve components: batteries, battery life, UV resistance, durability, etc. The final product is then tested to simulate the durability of the assembly over time: The light is fitted to a test bike to reproduce the vibrations of cycling on a road for several thousand cycles.
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