Description
Serfas Thunderbolt 2.0 tail light:
Mode Lumen Runtime
Low 10 up to 5.5 hrs
Medium 15 up to 2.25 hrs
High 25 up to 1.5 hrs
Low Flash 10 up to 13 hrs
High Flash Fast 25 up to 5 hrs
High Flash Slow 25 up to 9.5 hrs
Daytime Flash 50 up to 19.5 hrs
