Light Switch 02 speaks to the player in a seductive tone and makes comments on the player's decisions. She is also in a rivalry with Light Switch 01, referring to her as "that frigid little ice queen".
Once the player retrieves the upgrade module, Light Switch 02 can bathe the Courier in "Mood Light", increasing their Charisma by 2 points, and their Speech and Barter skills by 5 points each. The effect lingers for 12 hours after initial exposure, or until the player activates Light Switch 01's "Smart Lights".
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 CIU.