I have to disagree that any of those, even the Mag, is too heavy to carry. I have no problem carrying my Mag. Not as easy to carry as something smaller and light, but it isn't really difficult. For walking though, one of the Tigerlight's might be the best choice. The beam is wide enough to light up a path, and with the O.C. model, you have a ready self defense item in hand. The FBOP or 8inch model would be nicer to carry though.
The only negative to any of these, is that short runtime. If you don't need a superbright light, consider a Stinger, or SureFire 8NX, and an extra battery. You could carry the extra battery around in case you needed more than an hour's worth of light.