I do a lot of trekking here in new caledonia, it is under the tropic , so days are short.
Most of the trekking and hunting sart in the dark and does finish in the dark!
I use petzl tikka xp with on set of new battery in the lamp for each new trip.
Some trip last 3 nights and the petzl xp can last 3 night on economical mode no problem.
for hunting trip i also add to my backpack a led lenser P17. led lenser optic are far more efficient than maglight,more economical on battery.
Plus if you shoot a deer at sunset like most of the time i do here, p17 make easer to recover the animal in the bush. because of the very wide optic you can scan a very large area.
About the petzl tikka xp, I did last year a trip with my sailing catamaran from Noumea to Boundaberg(australia), 800 nautical miles, 5 days trip and of course 4 long nights behind the sterring wheel since the autopilot **** up the first day.
I use the tikka in red light mode for 4 consecutives nights and it did work very good,you can still read map and gps and at the same time doesn't destroy your eyes night vision capacity.