In reply to Alan M:
I've had a Nitecore head torch for about 5 years.
http://flashlight.nitecore.com/product/hc50
It's the best I've found. Totally waterproof (I sea kayak with it too), phenominal battery life, easy to use big on/off button (works with mitts), superb beam width and depth. I usually only have it on the lowest setting (also has red light for night nav work). I took one of these on a kayak trip across Greece for 10 days, used it every night, got back and the battery was only half used.
Downside: a bit heavy. Proprietary battery means you need their charger too, could be tricky for an extended expedition, but vape chargers are now more common place. I carry a spare battery that I've never needed! Bit bulky for running with, but I've done that ok too.