well i would say any where you burn wood,these will start the fire all you need is a lighter or match,inside or outside,then you put wood on it you dont take it out of the paper paper stays on and you just light them,they can be real pricey in the stores! thank you hope you can bid and i love that little thing in your hands to awww*
i really dont know maybe 1 and a half hours,dont know cause i add wood so you really cant tell you would be wasteing them if you use alone tho ,it would take to many to get a good fire,also yo dont have to use the whole bar you can slit them to!!hope you bid thank you !!