Most cigar lighters use butane. These lighters are jet lighters and come in different shapes and sizes. Jets can have one or more jets at varying angles for the best possible burn. The most important aspect of a cigar lighter is that it burns clean. If the gas in a lighter does not burn clean the residue form the flame may taint the cigar. Cigars will absorb the characteristics of what ever it comes into contact with so a clean burn is highly important.
Cigar lighters vary in price and quality. It would behoove the buyer to research any lighter before a purchase. Premium brands include Xikar, Davidoff (pictured), Colibri, and others.