A pilot light, as its name suggests, uses a small gas flame to ignite a larger source of heat, such as in a gas oven. In our world an electrical spark has become a more common method of gas oven ignition, another thing that diverged between the Fallout universe and our own.
- One is needed in the creation of a Shishkebab and it serves as Rock-It Launcher ammunition.
- In the Tranquility Lane simulation, loosening the pilot light in Martha Simpson's oven and asking her to start it will result in a gas explosion, killing her.
They're frequently found in ovens (found in many abandoned houses, for instance in Minefield), or in workshops. A pilot light can be obtained early in the game by searching through Silver's stove inside her house in Springvale, in the Super-Duper Mart in the back room, or in the RobCo facility.