Those are cool torches Doc. Must see what I can make that is equivalent down here in the South Pacific. I think our early Maori folk had some sort of thing they used, but I can't recall what I've read now.
Doc.... the
Fount
Of
Knowledge. That is true. From now on you should be referred to as
Doc the Fok.
I think LED flashlights, particularly headlamps, are one of the greatest bits of technology of my lifetime. I spend a lot of time away from the 'grid', and these little beauties have really made improvements in my life.
Prior to discovering LED lighting, one of my major breakthroughs was coming up with a bottle lantern that protected a simple candle. A candle on its own is easily blown around in the wind. If the wind doesn't blow it out, it often makes the flame go sideways enough to melt the rim of the little wax 'dam' that holds the pool of molten wax below the wick.... and consequently this wax runs down the candle and the candle burns away really quickly.
Knocking the bottom out of the bottle is the big challenge. In fact the bottomless bottle can be used by itself to offer some protection from the wind....the candle can be jammed into the neck, and the bottle is held by the neck like a torch.
The wire gets very hot directly above the opening of the bottle.... so keep it plenty long enough...and don't hang the bottle beneath flammable materials.... allow plenty of air gap above it for the heat to disperse.
I have knocked the bottoms out by placing a four inch nail in the bottle and shaking it up and down a few times. It doesn't always break cleanly. A colleague suggests warming the bottom of the bottle above a flame before dropping a heavy object into the bottle while holding the bottle upright.... she used a stainless bread and butter knife I think. I run a stone around the broken edge to reduce the sharpness. Broken glass is sharp.... be careful.
Gotta go and make me one of those awesome torches now. They'd be safe enough on a gravel beach or in damp conditions.