Beam Comparison - Bike Light
Battery Life vs. Beam Distance - the above graph shows how beam distance at the brightest setting degrades as battery life runs down. We use the ANSI FL-1 battery run-time spec, which says run-time for the high mode is finished when brightness degrades 90% from its initial value.
Bell Dawn Patrol: we measured the maximum beam distance as 38 meters and the ANSI battery run time for the high setting as 22 hours.
Light and Motion Urban 550: we measured the maximum beam distance as 116 meters and the ANSI battery run time for the high setting as 1.1 hours.