How much distance should there be between the bike light and the magnet? Mille Stech Jensen June 13, 2018 08:21 Updated You should strive to have a distance of approx. 1-3 mm between the bike light and the magnets. Related articles My CPH light does not flash? Is there any advantage of adding extra magnets to my CPH light? What side of the bike is the CPH bike light most suitable for? The beam is too weak if you ask me - is that just how it is? Does the magnet mount on flat spokes? Comments 0 comments Article is closed for comments.