The Goma Ritual in the field held by the Tendaishu sect Honzan school is called '採燈護摩' (saitogoma), because it was held with the fire picked ('採取') from the saitogoma of the Shingonshu sect Tozan school, and the character is used in it.
なお、天台宗系本山派が行う野外の護摩供養は、「採燈護摩」というが、真言宗系当山派の柴燈護摩から「採取」した火により行われたので、その字が当てられるようになった。