Where I am happy with the Light from my Edelux headlight.
But I did have a 2 light Nightrider and with 2_20w halogen bulbs
and the 12V battery pack it was quite bright
for most of the battery ampere hours available.
Dynamos on bikes are 6v3w,
[there is 1 bottle dynamo
from Germany that is 12v]..
battery pack sizes are up to what size you want to assemble.
solder together the cells, box them up, etc.
Last edited by fietsbob; 05-13-12 at 11:41 AM.