Light Switch 02 Upgrade: "Mood Lights"

Light Switch 02 Upgrade: "Mood Lights" is a holodisk in the Fallout: New Vegas add-on Old World Blues.

Locations
In the Saturnite Alloy Research Facility, as soon as you walk in the facility make a right and walk into the factory floor. To your immediate left there's a locker with the upgrade Holotape: Mood Lights.