While on my last night cache I used the Princeton Tec Apex headlamp. Most of the time I used the mode that uses the 4 ultrabrite LED's. This setting provided good lighting of the trail and was very useful locating the reflective trail markers. At one point when the spacing of the markers greatly increased I changed to the mode that uses the maxbrite LED which dramatically increased the throw over the ultrabrites and I could then locate several markers further ahead on the trail.
This headlamp can use NiMH rechargable AA batteries along with alkalines and lithium.
I have found this headlamp to be very comfortable due to the strap that goes over the top of my head along with the battery pack in the rear.