So after driving with a couple different configurations, the only real change to the strategy is going to be that rather than swapping lights back and forth, I'll be permanently installing an array on the e-bike and plugging it directly into the electrical system, and keeping a seperate array on the mtb that might get shared with the hybrid. I can light up the road clearly for 80 feet in front of the bike on low beam and the rear lights paint the road red for 25 feet behind me.

The feedback has all been positive from pedestrians and cyclists - everyone wants one - they just don't want to pay for it!