Lights

That's the light I've recently ordered (£35 on ebay). It's a favourite for sure. Most of the mountain bikers on the local trails use one on the head and one on the bars and manage to light up the forest!

I'll let you know how I get on with it if it ever arrives.

Decided to go with the same one myself, ordered from the UK so hopefully it won't take too long to arrive. Paired with my (really) cheap 5w Cree torch on the helmet it should be enough for Muddy Hell too, as long as the mount is reasonably sturdy.