A head torch is a really useful item to take night hiking or on cycle tour. I first bought one for my 100km 24 hour walks, so I know they are good in the dark and don't eat up batteries too quickly. They are useful for hands free stuff like riding in the dark, setting up camp, collecting fire wood, navigating etc. They usually have three settings for brightness so you can adjust to conditions and manage your battery life accordingly. You can use it like a normal torch too so you can save weight by bringing only this and your front light. Worth every penny!