Thanks, that site looks very interesting. I do not own a Dynamo yet but the Sram Dynamo at around 70 might be an acceptable option. I have not found reviews comparing it to the Schmidt version which is touted as being the best one for efficiency. My front wheel being a 20 may play into the possibility of getting 10 Watts out put which would put it in the area that seems like it should be able to supplement a battery nicely and charge it back up during the day if necessary with that one HID working nicely at 10W. Although if the tech on the LEDs keeps going maybe by the time i decide whether or not to get a dynamo and which one there will be a real nice match?

My thoughts are that if i can whip myself into shape this spring i may wish to go on a week long ride either here in Colorado or someone was suggesting joining them on a trip across Wisconsin. Last fall i did take a ride of 27 miles from Akron to Yuma on a 20" wheeled Sun easy rider. I found the small wheel to be a limiting factor at times but i somehow survived... So when the weather starts to get warmer again I hope to start making a pilgrimmage to build up endurance on the weekends. But the thought has crossed my mind that i do not wish to depend on being able to plug in to charge batteries if i decide to try one of the longer rides. As a commuter a battery powered headlamp on my head works well so far...

I would really like to see what you come up with using the Cree 5 set up.