I was trying to show how you could put the
heat generation of the lanterns to good use:
keeping things from freezing.

Those decorative "oil" lamps seem very dangerous:
easy to tip over or break. I do not like glass
or plastic pretty things that sit around where
they can get knocked over or broken, causing fire.
Oil lamps and creative craft candles have caused
a lot of fires in the U.S.; they were fads for a
while.

This reminded me that a metal wicked kerosene
lantern could probably start a fire, if it
were over-turned.

Agreed, pressurized lanterns that burn using a
mantled-wick are super bright, and more efficient;
but they are more complex, and break down more.

For Long-Term Preparedness, kerosene is (would be)
more generally available; special propane cylinders
and batteries may not. I agree that liquid fuel is
messy and dangerous to store (illegal for large amounts).

A few Candles would be a good idea, though they are a real
fire hazard, when in use. Put a 4 inch (10cm) candle on a
large dinner plate or pie pan, and it is somewhat safe.
In the U.S.A, food stores often have a small section
of Jewish food and candles that are quite low-priced.