At this latitude we get lots of night ops. I have a Mini-Mag Lite (2AA) in the seat back pocket - it has been retrofitted with the NiteEyz LED head and pushbutton tail switch. I have a headlamp on the headset hanger - it features 1 small incandescent bulb that never gets used, plus white and red LED's - I rarely use anything other than the white LED. I also have a NiteEyz LED conversion for a Mini-Mag in my flight bag, plus another incandescent Mini-Mag in my flight bag. I also have two small clip-on LR-44-powered LED lights clipped to the headliner. Attached to my Bose X headset is a Browning Ballistic 2AA swivel-head red flashlight. In my flight bag is a small Xenon strobe light powered by 3 AA cells - I've left this on the ground and have seen it from the air at a distance in excess of two miles at night, so it's a pretty decent rescue beacon.
Why so many lights, you ask? I once flew at night and ended up with absolutely zero working lights. The aircraft interior lighting failed. The flashlight in the seat back pocket lasted about five minutes before it died. The flashlight in my flight bag came apart as I fumbled to remove it from the flight bag and I never did find its end cap. Not a good experience. When it comes to night flight, I believe in a belt, suspenders, another belt, and then some more suspenders. It's no fun when things are totally dark. Fishing around for your handheld radio in your flight bag, is a pain when you can't even see your flight bag. Today's LED lights are so cheap there's absolutely no reason not to have several of them as a layered system of defense against having to operate in total darkness.