Create a new article
Write your page title here:
We currently have 56,934 articles on Fallout Wiki. Type your article name above or click on one of the titles below and start writing!

Fallout Wiki
Holiday Decor 2023.png

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

Light Switch 01 is an Artificial Intelligence at Big MT in Fallout: New Vegas.


The holotape to activate this station is found at the X-2 Transmitter Antenna Array. Light Switch 01 makes innuendos and comments on the player's decisions. The Light Switch 01 Upgrade: Smart Lights can be found on the bottom-most level of the X-12 Research Center leaning against a projecting unit. It argues with Light Switch 02.

Interactions overview

FO76 ui icon quest.png
This character is involved in quests.


Effects of player's actions

  • After retrieving the upgrade module for Light Switch 01, the switch can bathe the Courier in "Smart Light," effectively increasing their Intelligence by 2, and their Science and Repair skills by 5 points each. This effect lasts for up to twelve hours, or until the player activates the "Mood Lights" controlled by Light Switch 02.
  • Without the upgrade module, it is only possible to use the light switch to toggle the normal lights while the Personality Matrices are toggled off at the Sink.
  • The Courier can flatter it using the Cherchez La Femme or Lady Killer perks.


  • "Unlike certain other lightswitches, I'm competent, I'd just love to turn those lights on for you."
  • "Have you been poking at the other light switch? You know she's riddled with virii don't you?"
    Icon sound.png
    Icon sound.png
    Play sound
    LS01 6.ogg
  • "Adjusting lights for maximum concentration levels."
    Icon sound.png
    Icon sound.png
    Play sound
    LS01 3.ogg
  • "Is the light level to your liking?"
    Icon sound.png
    Icon sound.png
    Play sound
    LS01 5.ogg
  • "Maybe we could dim the lights and have a candlelit discussion of classic literature?"
    Icon sound.png
    Icon sound.png
    Play sound
    LS01 4.ogg
  • "Oh.. well.. That's very sweet of you. Maybe one of these nights we can 'discuss theorems."
    Icon sound.png
    Icon sound.png
    Play sound
    RC LS01 1.ogg


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

Behind the scenes

Travis Stout wrote the light switches' dialogue.[Dev 1]


PCPC The "Smart Light" and "Mood Light" bonuses are applied to the player only when the player enter dialogue with the light switch and toggle such light. So, after the light is toggled, when the bonuses passes, just re-entering the Sink and be exposed to the light won't be enough to get the bonuses again.

  • In this case, to get again the bonuses of the light already toggled, it is needed to first toggle any other type of light (even normal light or lights off will work) and then toggle to the desired light again.



Developer statements

  1. Chris Avellone on Twitter: "Thanks to Travis Stout (light switch writer, among others) and @Veronica for the voice acting. Glad you enjoyed it, they are to thank!"