These were recommended somewhere, and I ordered two of them from Amazon for a total cost of $8.99 with free Prime shipping.
Wow! These small LED flashlights take a single AA battery and throw an AMAZING amount of light (300 lumens, whatever that is). They also have a solid metal clip to mount on hat, bike, pack, or pocket, a solid metal body, and 3 light settings (bright / dim / strobe). There is also a "zoom"feature which allows you to adjustable focus range to concentrate the beam or widen it to light up a big area.
Just so you know, I accept no free product ever, will endorse no product for money, buy stuff with my own cash, and never give an endorsement unless I think it's worth it. And yes, I am cheaper than anyone you will ever meet. If I like it and say so, that's a hard endorsement to win. I've only tried this flashlight out last night while working on a pump problem, but I am sold.