That's cool. If you unscrew the caps of those lighters you can either a) take out the little plastic thing that limits the range you can adjust it and then adjust it even lower or b) extend the electric sparker wire using a piece of wire from some other stuff you've taken apart and some electrical tape, and run it up to the top of your metal tube. I suggest trying out 'B' because if you do 'A', then how will you spend your night? I also have a lighter that has air control so you'll notice the little air holes torch stems or heads have. The air control covers those holes to make the torch flame softer. On other torches that don't the have air control thing, covering the little airflow holes different amounts results in different intensities of flame. I use tape.
err... plastic? i think you are referring to 5mm diameter pyrex tube.
naah, it's easy to light it on without the spark, i just fire a normal bic lighter onto the tip. so i always carry 2 lighters, 1 torch & 1 bic.
tried covering the airflow once, but it didnt change anything.. i'm quite curious