Vault 42

Vault 42 is one of the Vault-Tec Vaults. As part of the Vault Experiment, no light bulbs of more than 40 watts were provided. The location of this Vault is unknown. This could be one of the few vaults that actually allowed people to survive, as there is no problem with living with lightbulbs of 40 watts or lower, of course it might have affected the eyes of the people living inside

Appearances in games
This Vault does not appear in any game and is mentioned only in Fallout Bible.