got good to use
i tried that kind of thing with some electric igniters i made. i took a piece of steel wool, same concept as rocket igniters, and hooked it up to a 6v r/c car battery (700mah) and it ignited black powder. but when hook up to a camera flash circuit, with 330v, all it did was explode, in a blue light, and do nothing. those igniters are meant to get almost red hot, which will ignite the charcoal at the tip which will ignite the rocket engin. what i would do is make an igniter box out of a 6v rechargable r/c car battery, those work great and last forever, and you never have to buy another one because you can recharge it. go to radio shack, get a project box, some clips, wire, a push button, a on/off switch, and a dc power jack(for recharging it without taking it out of the box).