Did you have in mind something lightweigt just in case you get caught out after dark or are you planning long days? Is it safe to assume you don't have a generator hub? Are you camping or using hotels, or otherwise have access to electricity for 1/2 hr or so every day? That info will help.
Generally, assuming you are not planning some sort of extreme ride, you would plan to stop each day before dark. If so, then I assume your need for a headlight is for occaisional use when you get stuck out late or decide to leave extra early. For such case, there's little reason to pay the expense of a generator hub and light. Better to go with an LED light. You might consider one, or both, of the following:
1. A Cateye EL500. This headlight gives acceptable light level to see the road as well as be seen. It runs for many hours on four AA batteries and can be detatched for use around camp or to provide light for a nighttime flat tire repair, etc.
2. A head-mounted LED light such as a Petzel brand light. These are hiking oriented and are not very good for seeing the road, bit will do for being seen. This would be primarily for emergency use where you did not plan to be riding after dark. The light is very useful around camp, so you may want one even if you get a dedicated bike headlamp.
I would definately stay away from halogen lights, or any high powered light with short runtime and unique rechargeable batteries. The runtimes are usually only about three hours. You have to carry a recharger, and find a place and time to use it.
Cannondale T800, Specialized Sequoia and a Specialized Sirrus.
Planet Bike Sport Spot does the job of a head lamp/flashlight, helmet light and bar mountable as well. It's not great for finding your way, but it'll do. It's a great be seen light, great for camping duties, tent reading/writing and runs forever on the 3 AAAs it comes with.
In another thread there is a discussion of wind-up lights. These are barely adaquate for riding but allow you to been seen at night and are useful around camp. The big advanatge is independance from batteries.
Some silver ones, a black one, a red one, an orange one and a couple of titanium ones
Originally Posted by GeorgerinNH
no hotels, tent camping, and no hub generator, possible a solar panel depending on the $, no i plan on riding during the light
It's best to keep things simple so stick with alkaline batteries. With an LED light they should last the whole tour but if they don't you can always buy batteries along the way. Carrying a charger is just one more gizmo that you have to keep track of.