I use a Petzl e+lite. It's only 26 lumens on high (55 hours!)- so it's not super bright and may not work for meat hauling. But I've hiked in the dark with it and it worked just fine. Also, it has a red light for checking things out in the dark without ruining your night vision.

It weighs less than an ounce and has a positive on off switch (I'm not a big fan of the soft switches - they always seem to find a way to turn themselves on while in my pack).

Most of the time I use it to cook, read, or walk around camp. And for those chores it's perfect.