These are excellent little keyring torches:
http://www.amazon.co.uk/ThruNite®-T10T-Flashlight-Single-titanium/dp/B00JZOZBBK
162 lumens from a AAA, the glow worm function is surprisingly handy at 0.5lm, if you just want to see a keyhole, or find your way around a very dark room without dazzling yourself. Very floody light, with even spread and no centre hotspot, perfect for walking along a road or woodland path.
I’ve got a bunch of 18650 torches, and they’re great, but they’re also big and bulky, usually, and can almost be too bright.
I’ve recommended this one a whole bunch of times, and it just gets cheaper, it’s a fantastic little light, takes a AA/14500 Li-ion, and puts out 230lm. Really well made, I’ve got three, I’ve used them on my bike with a Twofish block, and on my crash hat as well, had them for years, and they’re pretty reliable.
One of mine has gone missing, but as I only paid around £12 originally, and they’re now down to £8.50, I’m going to buy three more, they’re that good!
http://www.dx.com/p/trustfire-r5-a3-cree-xp-e-r5-3-mode-230-lumen-memory-led-flashlight-1-aa-1-14500-39062?utm_source=dx&utm_medium=edm&utm_campaign=20120912#.VvAT-PDfWK0
A bit more of a centre spot, ideal on a bike with the outer ‘halo’ picking up verges.
Really unbeatable at the price.