I was reading about some high end lights and noticed that a fellow who uses 2 of these lights uses them on his randoneuring bike which has a handlebar bag and then he uses a Topeak handlebar extender upside down to shine the lights from under the handlebar bag; I thought, what a great idea.

On this page, TopeakŪ Cycling Accessories ? Products - BarXtender?, there is an example of its use this way.