In article . com,
Prisoner at War wrote:

On May 2, 3:31 am, Peter Clinch wrote:

If burn time is an issue get a hub dynamo unot, and then the burn
time is as long as you keep moving. No fiascos with battery
charging, no fiascos with forgetting your lights. Partner with the
LED B&M D-Lumotec Oval Senso plus, switches the lamp on
automagically when it starts getting gloomy so no moving parts on
the switching to break either.

Worth supplementing if you're doing a fast descent on an unlit road
and don't want to slow down, but otherwise good for most stuff.
The SON is the best of the hub dynamos, especially if you've a
small front wheel.

I was looking into just that when I was first considering my 'bent,
but, to my way of thinking, the whole point of a light is its
brightness, and them HID lights are the brightest out there, so it's
HID for me!

The point of a headlamp is not its brightness. The point of a headlamp
is providing useful light so that you can see where you are going. That
is as much a function of the optics of the light, not simply the power
consumption of the bulb. BTW, that's all the wattage rating is- it is
not a measure of light output. Bike lamp manufacturers have a tendency
to keep the output of their lights a confusing secret by mixing watts,
lumens, candlepower, etc.

Besides, the NiteRider claims eight hours at 13.5 watts...even if
it's really just five or six hours, that's still long enough for most
real-world applications I can imagine!

Not mine. YMMV.