Just for grins, I lit off a few pieces of fuse stuck into the ground with a 4" magnifying glass. Once I got the concentrated light on the end of the fuse, it almost immediately started smoking and then lit off within about 5 seconds. Not sure what this proves if anything, but it seems like a novel way of lighting a fuse.
I hate to admit it, but in windy conditions when matches or a lighter are difficult to use, I touch the end of a burning cigarette to the fuse, being careful not to break off any embers that could fall into the vent hole. This method will light off the fuse within a second or two.
I am not recommending either method, just adding (?) :grin: to this discussion.