Well, Litespin went belly up, so that is no longer an option (we have one, and love it). It does point to an important decision to make: where to get the electricity from? Batteries are one possibility, but I don't like them for serious cycling, as they run out, or you forget to recharge them. For their reliability and environmental advantages I much prefer generators. For a cheap setup that is really pretty good, get a B&M dymotec 6 (the S6 no longer exists) sidewall generator, and a round Lumotec front light. Use a B&M taillight. One step up in headlight quality would be the B&M IQ Fly headlight. One step up in generator quality would be the ultegra/XT level level Shimano hub generator. The (expensive) best there is would be a Schmidt SON hub generator combined with a Schmidt Edelux headlight.
We now have this last combination on two bikes, and it is awesome.
One reason this German stuff is so good is that they do indeed have standards. These also require lights to be focussed properly on the road, rather than shine in all directions and blinding oncoming trafffic in the process. Thus these lights also do not waste their output, but put it where you need it. Finally, these lights have good connectors and are mechanically much better than the cheap imports from the Far East.
Willem