I've been using a fairly low powered Nightrider light for the last few years. For this year, I'd like to add something a little stronger.

With just the Nightrider, I've been using it on my helmet. With the second one, I'll put a light on the handlebar.

What's the preferred way to do it? Have the more powerful light on the helmet and the weaker light on the bars? Or the other way around?