Do a girl from behind in a room with only one lamp. Just as you¹re ready to give her the juice, grab the lamp and smash it over her head, hence "Lights Out". For added fun, get a bunch of strangers to run a train on her while she¹s either still unconscious or not fully cognizant. Make sure the lights remain off. - McWopper, Mr. President, Squanto, Ling-Ling, Wilcro, Big Ju and the rest of the A-team
Lights out or lights-out manufacturing is a manufacturing methodology (or philosophy), rather than a specific process. Factories that run lights out are fully automated and require no human presence on-site. Thus, these factories can be run with the lights off.