That's a decision that I struggled with. It depends on how bright and how far you want to illuminate.
The "fireman" liteboxes made by Streamlight, Kohler-BrightStar, and others (as mentioned above) deserve consideration--I've never used one.
My thought was, however, that this is something (God willing) we don't do very often. What is the best way to have long-run time, long shelf life, and not being tied to a charger.
Unless you are in a very very cold area where the SLA cells work much better, I elected to have Alkaline-powered lights for this. I keep at least 3 dozen D cells on hand at any given time.
I selected a Underwater Kinetics D8.
While it doesn't "throw" well, it's a great light (but heavy--but not as heavy as the liteboxes) for walking in the dark because of it's wide coverage.
It has the advantage of two lamps for redundancy and runs (I think) about 6-7 hours (or more) off a set of 8 D cells. It has a 14W lamp.
I also like the Underwater Kinetics SL-6 for the long reach with reasonable run time. That runs of 6 C cells. I also keep at least 48 C cells in stock (and countless AAs).
Alkalines have a 3-5 year shelf life if you buy them fresh.
If I was going out all night, I'd take the D8 and the SL6 and a change of batteries for each probably along with my EDC (see sig). The SL6 and spare batteries would be in my shoulder bag along with my GPS and SF spares carrier.
I haven't thought much about water and clothing changes, but I think when I got to that a small daypack would be a better choice.
Let's hope we don't have to do this.
Cheers,
Richard