I keep about five tactical-style flashlights in my cache bag (yes I have a problem with buying new flashlights all the time - but at least I always have at least one that works). I also keep several mini-mags (usually the pink breast cancer research ones) that I use as swag items, but don't use them myself. My latest acquisition, though I have been pretty impressed with so far:
Nebo Redline
220 Lumens, less than half a pound, three brightness settings to save on battery life, adjustable beam, water-resistant, and even a built-in SOS morse code flasher (that I hope I never need). I had never heard of the manufacturer before I saw this, but so far it seems to be a pretty good all-around light.