I'm not sure specifically as I haven't read it. But it could potentially be about a mystery where someone is trying to eliminate sources of light, perhaps in a spooky or dangerous setting.
Well, without having read it, 'kill the lights web novel' could potentially be about a dystopian future where the lights are a form of control. Maybe the protagonist has to 'kill the lights' in order to break free from an oppressive regime that uses light and technology to monitor and manipulate the population. It could also be a horror - themed story where the darkness that comes when the lights are killed holds all kinds of terrors.
To find 'kill the lights web novel', start with general web search engines. Type in the exact title along with keywords like 'web novel' and'read'. Check if there are any social media groups related to web novels where members might share information about where to access it. Additionally, some libraries are starting to include web novels in their digital collections, so it's worth checking there as well. However, keep in mind that not all web novels are freely and legally available everywhere.
Yes, Kill la Kill originated as a manga. It gained popularity and was later adapted into different mediums, with the anime being particularly well-known.