Whether you char I don't think has any real effect on the number of lights it takes to produce a well-burning bowl. Charring is supposed to produce a good light on the second light but I remember any number of smokes that took more lights, whether or not I charred. My point is that the cut of the tobacco and the pack determine how easy it is to light the pipe. One lights until the pipe is lit, and in this charring is not significant.