Serfas Thunderbolt 2.0 Rear Bike Light
About the Serfas Thunderbolt 2.0 Bicycle Tail Light
Be seen on your bike with this bright, compact rear bicycle tail light.
The Thunderbolt 2.0 tail light features a 50-lumen output with 7 different light modes.
We also offer the Serfas Thunderbolt 2.0 front light.
- 50-lumen daytime flash
- USB rechargeable
Weight: 40 grams
Battery: 500 mAh Lithium Polymer
- High (25 lumens) : 1.5 hours
- Medium (15 lumens): 2.25 hours
- Low (10 lumens): 5.5 hours
- Daytime flash (50 lumens): 19.5 hours
- High flash slow (25 lumens): 9.5 hours
- High flash fast (25 lumens): 5 hours
- Low flash (10 lumens): 13 hours