I stumbled upon this link earlier today. Probably the strongest bicycle lights I’ve ever seen. It’s a 24 Watt lamp, but the twist is that it’s made with ultra bright LEDs. If you’ve used one of these, I bet you won’t go back to the old piss poor standard bicycle lamps. If I were to start riding a bike in the woods, I’d probably build one of these.
Not only is it useful, but the images are pretty neat. It gives the Finnish woods a pretty eerie feeling. (Scroll down to the bottom of the source page for more)