To meet the ignition problems of gas turbines caused by wide variations in environment and the use of a multiplicity of fuels, a glow plug system has been developed which is proving very satisfactory. The system was developed with particular reference to the PT 6 and ST 6 gas turbines where, due to their small size, weight and size are of extreme importance. The glow plug system is extremely lightweight in comparison to spark systems suitable for gas turbines and relatively inexpensive. The ability of the glow plug to operate under extremes of conditions has been proved in many engine applications. It has also proved extremely durable over prior art.