A lighter's resistance is very close to a dead short- - - -that's what makes the heater element get red hot. A 6V lighter will get very hot, very fast on 12 volts. Most of the time the heater element itself can be changed while keeping the original knob for appearance sake.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!