Originally Posted by cryogenic
That's pretty impressive, to say the least. You've put a lot more work into that than I would ever consider doing. I'd just buy a decent headlight and taillight and call it a day.
That's pretty much what I did with the headlights, but one of the design goals I had was that the whole system be run from a single battery, with a convenient charging connection. That way, when I get home at night, it only takes me a second to connect the charger, and the whole system will be good to go for the next day. I didn't want to have to worry about multiple chargers, removing multiple cells to place them into chargers, or anything like that; I know my own laziness would lead to situations where I'd forget to charge some of them, or I'd play the game of extending the charge "just onnnne more day". Here, I put in a bit more one-time work up front, in order to reduce the amount of hassle incurred on every ride.
Beyond that, when I looked at pre-made tail lights, I didn't see any that I really liked; back then, they were all powered by AAA cells, which I don't particularly like. Cat Eye's new 2*AA tail light looks nice, though, I wouldn't be ashamed of that. My side/front marker lights are just bonus.