For $12.97, a Princeton Tec Attitude is a great deal. Stoke it with 4 AAA lithiums, and it weighs very little over two ounces. They are 4.8 inches long, including the little lanyard holder on the tail end; the body is an inch wide and about 0.5 inches thick. The yellow case is the easiest to find when you need it.

I've purchased eight (yes, 8!) over the past few years (for myself, family, and friends), so you can tell I've been happy with them.

The ones at Campmor are on closeout because they are the older model. I have both the older model and the newer one, and the only difference I can see is a slight change in the plastic housing. The new model has a pocket clip molded in. Frankly, I like the older model better as it seems less bulky.

Last, but not least, Attitudes fit very nicely in the crassly-named Jakstrap flashlight holder, so you have an instant headlamp. Get the smaller Jakstrap, not the larger Jakstrap II. Happily, Campmor sells the smaller Jakstrap.