For my own Dahon Boardwalk, I use a 30 U.S. dollars simple set of battery powered haligen lights with a blinking rear red light that can be clamped on anywhere. The front and rear light is a clip on style to facilitate the removal of the part without tools after I screw in the handlebar and seatpost clamps. When I use them, the handlebar mounted front light is used as intended directly on the bars. The rear light is actually clip on my back pack that I usually carry. This set up works for me as I tend to fold the bike at least once when on any length of trip.