The answer to 'why is my smoke detector flickering lights' is that it's a common sign of a low battery or other issue with the smoke detector. Smoke detectors use a small LED light to indicate that they are powered on and functioning properly. When the battery starts to run low, the LED may start flickering or blinking intermittently as a warning sign.
Other potential causes for a flickering smoke detector include a faulty electrical connection, a problem with the smoke detector's internal components, or interference from other electronic devices nearby. If the flickering persists, it's generally a good idea to replace the battery or have a professional electrician inspect the smoke detector to determine the root cause.