100% you need two lights. Because if one suddenly goes out for any reason (battery, cable, light fell off, crash, whatever....) it’s suddenly very, very dark and you’re still on the move.
Plus the other light helps to then troubleshoot the problem. I used to carry a third cheap tiny hand torch in the pack too just in case.
Plus the other light helps to then troubleshoot the problem. I used to carry a third cheap tiny hand torch in the pack too just in case.