I had a Sanyo BB dynamo that I used to power a 3V Sanyo Halogen headlight. Of course it doesn't hold a candle (pun) to modern LEDs, it powered me through my first midnight century ride. Works well on the cheap and much better than a sidewall bottle dynamo IMHO.

Don't do a 2.4v headlight .6v taillight if you're going this direction. Use all the power for your headlight. Do a battery taillight if you have to.

I didn't have mine setup for a cable pull, but I could easily flip the lever on and off with my toe while riding.