Flame Adjustable Pilot Burner light is a small gas flame, usually natural gas or liquefied petroleum gas– LPG, which serves as an ignition source for a more powerful gas burner.Pilot Burners are mainly used in annealing furnaces for forging materials, etc. Gas or fuel flow is controlled by nozzle provided. Porting for fuel is given separately. This can give a flame of at least 10 inches long.