I have now confirmed my suspicions regarding "normal" birthday candles and Estes model rocket igniters. The igniters are not powerful enough to light a normal birthday candle. (I tried twice, with follow-on tries with the remnants, as the super-thin heat-generating wire outlasted the "match head" material.) The igniters may be enough to light a real match, but not a birthday candle.
Of course, I probably have a bit of green "cannon" fuse around here *somewhere*, and if I coat that with wax, it could *look like* a candle, and I know for a fact that an Estes model rocket igniter will light that fuse if you poke it through the green "casing" and into the center.
I think I'll go with waterproof matches, however, since candles are a lot easier to blow out than wax-coated cannon fuse. :biggrin: