I now find myself captaining a 15 foot long bicycle 'train': tandem, tag-along, and child trailer. I have bottle dynamo head and tail lights on the tandem, but I realized last night (in a gentle rain) that it might be a good idea to have a taillight on the trailer, and perhaps even on the tag-along (in case I ride without the trailer sometime).
What do you think? I'm partial to non-battery lights, and am thinking about some of these reelights.
When I first thought about the problem, I imagined some sort of hookup where you could draw power from the generator, perhaps via an audio plug of some sort, but that might be more trouble than it's worth.