I've used a jag of different stuff, searching for THE LAMP....
There ain't one.
Find one with good lumens, and a good run time. Bonus points for running off of regular batteries that won't have you selling a kidney so you can have a couple spares in the bag.
I've got several Petzl jobbies, and they are ok. Water resistant +P, and reasonable run time. A couple of different modes for brightness is handy. Softer light for walking out if it is real dark is a plus, as is REALLY FUCKING BRIGHT mode to see exactly WTF made that stick snap 20 yards off beside you.....(grin)
That said, I've had real good luck with the Browning (gag/cough) branded ones that run off of one AA battery, and have different color options.
Got a couple of the Fenix ones too, but the high dollar batteries are a turn off, as is the relatively short run time.
But if'n you find a good one, do say so... I'm always looking for a better mousetrap.