I am still trying to solve the night headlight issue. I currently use the Cateye top of the line LED. It's certainly bright enough to be seen and for seeing where you are heading (in time to miss telephone poles, guard rails, bollards, and such), but not nearly bright enough to actually light the road. Hence, if I ride at any speed at all (and I am want to ride at speeds as extreme as I am capable), I am forever banging over unseen potholes, road debris (doesn't take much at 35 mph - a decent size portion of a tree branch can mess up your wheel).
My main issue with brighter light systems is their burn time and the weight of their power supply.
Newer systems are coming along all the time that address my concerns, but, so far, I am not yet satisfied.
I do want to see where I am going - and I would love to be able to ride in strange territory with the confidence that I can actually see road hazards before I am upon them, but, I don't want to do so at the cost of giving up the light weight advantages of my bike.
Obviously, if a lighting system is so heavy that I'm tempted to take it off during daylight hours, chances are good that I will find myself out in dark conditions with nary a beam. The opposite extreme is to ride around carrying three or four pounds of unused battery power during the day.
I'm still waiting to find a solution that suites me.
Caruso