I had one on my college-era Peugeot (it was the 90s, the bike was from the 70s), and liked it a lot, but they don't seem to be made that way any more -- the ones I've seen for sale more recently all seem to run about $250, which is a more than I have to spend on a lighting system, and to be much heavier. They do put some kind of dealie on them now so that your light doesn't go out when you're stopped, which people always thought was a downside to the old style.

But I'd be really interested if you do some research and post about it. My idea lighting system would be dynamo-powered and bolted onto my bikes with metal brackets so the lights couldn't just be yanked off while I'm parked outside on errand runs.