Back around 1959 or so Papa (my grandfather) gave me a Schrade Walden Stockman's pocket knife and a pocket whetstone. The stone had two grits, one on each side and was wraped in a bit of oily rag. By the time the next Christmas rolled around I had become good enough at sharpening the Schrade that he felt it was time that I had my own tin of BandAids...

A few years ago I found myself sitting on the back doorstep sharpening my pocket knife and realized that it was dark out there. That's when I finally realized that the sound and the feel of the knife on the stone is much more important to the end result than the sight of it. The knife came out just as sharp as if it had been done midday.
I owe a lot to that old man (actually he never lived to be the age that I am now). But one of the most valuable things that he ever taught me was how to put an edge on cutting tools. Not just knives, but scythe blades, mower blades, scisors, garden hoes, axes, etc.
I own a Lansky system, but I find that I can get a better edge more quickly with a couple of Arkansas stones and a strop. It takes a bit of time, and maybe a bit of blood, to learn to use whetstones but just about any method of sharpening a knife takes a bit of skill.
Of all the tools available for sharpening a pocket knife I value none higher than a pair of Arkansas stones (a soft (coarse), and a hard (fine)). And you don't even need a lantern, let alone a power outlet.