Light Switch Not Working Entire Room Dark Electrician

https://fire2020.org/bathroom-extractor-duct-blocked-steam-everywhere-how-to-fix-ventilation-duct-issues/

Diagnosing Electrical Faults: Why Your Light Switch Might Leave the Room Dark Common Causes of Electrical Faults in London Homes As of March 2024, residential electrical faults causing a whole room to go dark due to a faulty light