So as we got around Yosemite a few weeks ago, we of course needed some lighting source to get around our campsite and other dimly or unlit areas.
I brought some of the old standbys that I've used in the past, including a trusty Petzl Tikka headlamp. That one is bright and extremely well constructed, but occasionally suffers from flicker.
My flashlight of choice was a 9 LED/3 AAA model from Outback Flashlights - a small company in Utah with manufacturing done in China. They've got an "Australian" theme to their products, with a kangaroo logo and names like "Sheila", "Bonzer", "Bushman", etc. I guess the Sheila is marketed towards women with geometric and flower patterns, but I found one model that I liked at a gift shop in Mt Rainier last year. It's identical in construction to some solid colored flashlights with a different name. That light is rock-solid with excellent brightness (even with rechargeables) and no flickering. I've seen some of their products sold elsewhere (incl Yosemite) but they were either priced too high or the offerings were limited. I just bought a bunch of their lights on clearance from the manufacturer.
I also brought along a cheap 9 LED light I got at Fry's Electronics for $3. It's bright enough, but there's constant flicker and it refused to work for a while after I dropped it. I've tried several 9 LED/3 AAA lights from different sellers, but most weren't very good. Some had burned out lights while others flickered like crazy.
What do people here use for getting around in the dark? I remember my trip back in Dec 2005 I only had this rubber coated 2 AA light from Ace Hardware. I didn't exactly come prepared. I've seen a lot of groups carrying big old 6V lantern cells as well as the occasional propane mantle lantern.