If you really want to make your head hurt, try reading through all of the information on this site....
http://www.candlepowerforums.com/vb/...I thought I knew what i was talking about when it came to CCW lighting.....
I had no idea!!! Great information here, to make a good, solid choice in a tactical light.
Now for my take....for regular, everyday lighting needs, a light with multiple brightness levels, and complicated UI, will work fine, but IMHO, if you're going to use this for the serious task we're all talking about here, then the 'KISS' principal should be followed to the letter! The simpler the better...
My EDC lights, (yes I carry two!), are a Surefire C2 with a Malkoff M60 drop-in, for about 230 lumens of light. This light is the primary CCW unit. It's interface is simple, bright, and efficent. Battery life is about 1.5 hours of contiunous 230 lumen range light, which lasts somewhere around a month or more before battery changes, as it doesn't get used as much as the other light.
The other is a Surefire E2DL. It is nearly as bright as the Malkoff drop-in, though it is only rated at 120 lumens on it's high setting, (independent testing of a couple of the E2DL's show it to be closer to 170 to 210....
http://www.candlepowerforums.com/vb/showthread.php?t=229135) but a low of 5 lumens.
This is the more utilitarian light for me, because of the switching between high and low settings. The light comes on high, but if you turn it off and then back on in a strobing action or to illuminate a dark area, if you don't wait long enough it will come back on in the low mode which does little more than give away your position. So, while it may not be ideal for CCW, it is one heck of a general purpose light. This light is used more in low mode than any other light I have in the house.
For an idea of output, see below....
Surefire/Malkoff M60(LED) Combo

6D MagLite (incan)

The Surefire/Malkoff combo is noticably brighter in person, and is a fraction of the 6D's size and weight!
And there are less expensive hosts that will accomodate the Malkoff drop-in, including the Cabela's models listed earlier in his thread.
Hope this helps....
J.
oh, almost forgot...
http://www.malkoffdevices.com/shop2/index.php?main_page=index&cPath=1_14_18