Originally Posted by
UnCruel
If so, then that would reduce my measurements by a factor of 100 (the inverse square law). 20 to 40 lux at 10 meters would be pretty bright compared to the little tail light I tested with.
I have all the light I need to see where I am going at night in the country where there is no other lighting with an older B&M IQ-XS headlamp that was rated at 70 lux, now the newer ones of that model are rated at 80 lux. I have these on two bikes.