Funny thing they don't let one use a Betty Lamp in the places that I go, as it uses "flammable oil", and the fact that it will work off of fat is not an exception. I think it's due to there always being one sod who will omit the use of fat, and actually use kero or lamp oil, and torch a tent, in every crowd. They don't like wooden candle lanterns either. YET they will allow me to use a ceramic cup, and a twig wrapped in linen, with some bacon grease to make a candle for use in camp, but no Betty Lamps.
LD