Listen for a knock inside the house
To test Lights Out, listen for knocking on a door inside the house. Gamezebo’s walkthrough links the ending to leaving the light on in the room you occupy when the knock happens. The Roblox badge list confirms the name Lights Out but gives no switch or timing instructions.
The exact room and switch are not specified. Start with the event you can hear, note which room you are in and whether its light is on, then check the badge after the attempt. Do not treat an ordinary door sound or a knock at the entrance as the same event.
Keep the indoor knock separate from Granny
Granny knocks at the front entrance, where an old woman waits outside. Stay out of the hall and do not let her in on a survival run. Lights Out concerns an internal door and a room light. Testing the wrong knock can take you to Granny is Here instead.
For a clear Lights Out attempt, finish cat care, mail, dinner, and door locking as usual. When the indoor knock begins, note your room and leave its light on. Continue until the game presents an ending or an opportunity to sleep, then check the badge. The badge description does not say whether sleeping is required, so follow the current prompts rather than forcing that action.
Deal with the event on a survival run
Leaving the relevant light on is linked to the bad ending, so switching it off is a sensible survival test. This is an inference from the described failure condition. If the game gives you an explicit instruction, follow it. Check the light after the knock begins and resolve this event before wandering into another anomaly.
After each attempt, write down where the knock came from, which room you occupied, the light state, and the final badge. Those details help you separate two similar sounds. The anomalies guide compares the events, while the all endings checklist tracks Lights Out on its own.
FAQ
How do I get Lights Out?
Leave the light on in your room during a knock at an internal door, then inspect the badge awarded. That is the route described in the linked walkthrough.
Is this the same knock as Granny’s?
No. Granny is at the front door. Lights Out is tied to a door inside the house.
Which light switch should I use?
The badge gives no precise room or switch. Watch the live event, note your room, and record which light you tested.
Is the rule confirmed by Roblox?
Roblox lists the Lights Out badge without its trigger. The knock and light condition come from the linked walkthrough; confirm the result in your game.