Originally Posted by
antimonysarah
Look at the comments/Q&A -- they're allowing people to overpledge and then in your "shipping info" ask for the other rear light. Not sure they'll allow an infinite number of different overpledge options, but this was a request of a lot of people. (I mostly want 1 front and 2 rear -- the bike I'm planning to put them on is a city commuter, and these will be additional visibility/running lights to the battery ones it already has.)
Based on the location of the light you'd probably want to run two fronts anyways, since the wheel will obscure the side view of one light or the other. One thing I didn't mention but really like about them is that they illuminate the wheel, enhancing side visibility, especially if you have reflective tire sidewalls (like many Schwalbes have).