How much natural gas does a post light use per hour? (2 mantles)

Question

the front post light is similar to a Coleman lantern

Answer 1

The standard gas light with a dual inverted burner burns 2125 BTUs per hour. This is equivalent to 2.125 cubic feet per hour, which translates to 186 therms per year. You can check you gas bill to see how much you pay for gas (somewhere around 50 cents a therm?) This would be about $100 per year.