AXA Luxx 70 Plus Dynamo Headlight
This isn't just a bright dynamo headlight - it's also a method of charging your portable electronic devices!
With an integrated USB port in the side of this light, it's a must for long tours. It outputs the standard USB-spec 0.5A at 5V.
The LED lamp is 70 lux, which is bright enough for moonless nights with no street lighting. It has a standlight function, which means the light will stay on for 4 minutes after you stop (so you're kept safe at traffic lights).
It's water and shock resistant, and it includes various mounts.