As I just mentioned on another thread, I've been getting into flashlights (torches) recently.
I've been carrying a Photon 3 for years (and the 2 before that), which is certainly a lot better than nothing, but I was unaware of how much further things had progressed.
If you haven't looked at the field in awhile, you might consider doing so. Things have changed. There are some extremely small, lightweight, and almost incredibly bright lights out there.
Since I travel for two hours or more every day on the subway, I invested in one of the expensive Surefires to carry in my pouch; but I found it so useful that have recently ordered the Nuwai Quantum III for belt carry, even with my office attire. 600 lumens is a LOT of light, and it's just over 3.5 inches long. Please note it's size in the photo next to a common Minimag:
http://www.flashlightreviews.com/reviews/nuwai_q-3.htmIt's LED, so you don't have to worry about bulbs and filaments, and the $1.25 lithium batteries have a 10-year shelf life, so even if you have ignored it for years, it will still work when you need it.
These are currently being sold for about $50, but there is one dealer on the candlepowerforums that is currently selling 2 for $80 shipped (and, 'tis the season..).
I have no connection with manufacturers or dealers. I don't have mine yet, but, as you see, it seems to get excellent reviews.
I'll second what's been said on that other thread; the candlepower forums are an amazing resource.