ah, yes. that makes more sense. however, the need for a brighter light on the bike is greater. Need to be able to see further in front of you since you are moving faster.
REI has the Black Diamond Spot headlamp included in one of their sales for $22+tax. I don't own this one, but gave it to my brother a few years back for duck hunting setup and he likes it. I think I'm going to pick one up.