yeah, these lights can run on both ends. In real it's ridiculously large and looks like something Thor would carry around. Fun for a few hours, but in the end I took it apart and have two separate lights again.
MF01/MF02 looks like the best combo. Since there is a spring at both ends if you use two lights, it appears as though the o-rings will not do their job in case of too much moisture as you can't get a good enough seal on at least one of the ends.