Believe it or not, FF, I still favor an old fashioned carbide light for a lot of uses. I'm a long time caver (although not very active over the last few years
) and find these more reliable than electric.
Underground, light = life
.
They're simple, require only a handful of carbide and water, and they provide a nice warm, even light, and they make a nice hand warmer
.
Downside is they need cleaning frequently, spent carbide is not exactly eco-friendly, they don't work well in wind, and of course, there's the fire hazard.
Still, I guess I just an old school purist
.