I would also point out that to a complete lay-person, they are only either gas or electric. Have gotten that "dog hearing a new noise" look from a lot of people who had just asked me if that was gas powered and I said "No, it's glow.". I know it's not the most technically correct answer, but if some one who doesn't know the hobby starts asking questions there's no reason to be too picky yet. If they have any real interest, they'll eventually ask the same question as the OP here.