The Vault - Fallout Wiki

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The Vault - Fallout Wiki
The Vault - Fallout Wiki
Light Switch 01
FNVOWB Light Switch 1.png
Biography and appearance
RaceComputer Artifical personality
GenderFemale programming
AffiliationMobius (formerly)
The Sink
RoleLight switch
LocationThe Sink
Dialogue FileLight Switch 01's dialogue
QuestsAll My Friends Have Off Switches
Influencing People
Base IDxx00e6fd (activator)
xx00f062 (talker NPC)
Ref IDxx00c8c3 (activator)
xx00f06a (talker NPC)
ActorVeronica Belmont
Gametitle-FNV OWB.png
Gametitle-FNV OWB.png

Light Switch 01 is an artificial personality operating in the Big MT in 2281.


The light switch was used by Dr Mobius to research the ability of light levels to enhance human cognition. Once the doctor discovered that certain spectra of visible light actually increased cognitive function and reasoning ability, he programmed the switch with a routine that allowed for this spectrum to be activated across the Sink - and in a fit of seeming irony, programmed the switch's personality to detest Light Switch 02. When Mobius cut his ties with the Think Tank, the switch's holotapes were scattered at the X-2 transmitter antenna array (core OS) and the X-12 Research Center.

Interactions with the player character

Interactions overview

Perk empathy synthesizer.png
This character is involved in quests.
This character provides miscellaneous services.


Other interactions

Notable quotes

  • "Have you been poking at the other light switch? You know she's riddled with virii, don't you?"


Light Switch 01 appears only in the Fallout: New Vegas add-on Old World Blues