Here's my first torch, definitely older than me, and works perfectly well, on paraffin.
My next one is this, now converted to run off a led gell battery and fitted with a three watt Cree bulb. It gets charged via a solar panel. Both simple.
Now this. Modern technology, adjustable beam, an array of settings; high beam, low beam, strobe, and S.O.S flash mode.
What a pain in the @r$e.