On Sep 12, 4:24 pm, Chris Gerhard <
[email protected]> wrote:
> SMS wrote:
> >
>
> > Sure the SON can be pushed
> > to that [12 V, 6 W] at higher speeds, but it's not practical for many users.
>
> My son is wired for 12V and only when the speed drops below 10mph does
> it fade, but then at that speed it is really not a problem.
Two comments: First, getting 12 V, 6 W is also possible with at least
some roller dynamos. I do it with my Soubitez roller unit. It's
probably less likely to be successful with a bottle unit, though,
because the smaller diameter roller is more likely to slip under the
heavier load.
Second, if your two headlights in series do go too dim under 10 mph
(or whatever speed), you can cure it by wiring a shunt switch in
parallel with the second headlight. Close the switch to short across
it to take it out of the circuit at low speed, putting full power
through the one lamp. Open the switch at higher speed for both
lamps.
I've done this, with the switch mounted at my handlebar, near my
thumb. In fact, the version now on my commuting bike has a single
pole, double throw, center off switch, wired so I can select either
headlight, or both. It works pretty well.
- Frank Krygowski